Swimming forward slowly, the cold water made his lower body shiver with cold, but his face was red from the scorching heat above, he swam to the shore and climbed ashore with all his might, shaking off the remaining water from his body.

"The temperature here is at least 40 degrees Celsius, and the temperature of the lake here is less than 10 degrees Celsius, which is really a strange phenomenon!" Planck wrung out his clothes and pants, and quickly dried and refreshed under the heat.

"It's hot...," Planck began to sweat on his forehead, but even then, he was reluctant to take off his short-sleeved shirt.

The environment here is a little dim, and the only light that can be illuminated is the flames held in the hands of those strange idols in the distance, these flames can actually float in the hands of the gods and burn, but the color of the flames is golden, obviously not phosphorus fire.

Planck dragged his tired body forward a few steps, the soil under his feet was so dry that he could kick out the dust when he walked on it, and in the distance was a stone bridge with a huge stone gate on the side of the stone bridge, on which the pomp and circumstance of the Mayan sacrifice was depicted.

On either side of the stone door were two more dried bones, which looked to have been stored here for a long time, and at the slightest touch of Planck's hand, these bones fell apart and turned to dust.

Planck looked around, and there was no passage or place to go except for the statues of the gods and the quartz stones that sparkled like stars in the sky, and it seemed that he had to find a way to pass through the stone gate in front of him.

Planck carefully examined the contents of the stone door, which depicted a group of Mayans dressed in leaf animal skins and ancient headdresses on their heads, and the muscular bodies of men leaping to the surface of the paper, prostrating themselves under the huge pyramids, and a group of priests in fancy costumes dancing below.

And on the temple above the pyramid, a man prostrates on the ground and offers his most devout worship to the tall idol in front of him.

"Sacrifice?" Planck's hand rubbed a few times on the statue of the stone door, but there were too few clues here, and the stone door itself could not be opened at all, but there was a groove next to the stone door, and if it was said in the expedition record, it should require a "key" to open.

Looking at the groove next to the stone door, Planck didn't know where to start, this groove was an irregular shape, it was round at the top, but irregular at the bottom, if you look at it from the side, this groove looks like the outline of a human skull.

"Skulls..."Planck shook his head as he looked at the two skulls beside him that were about to decay into ashes, no matter how he looked at them, it couldn't be the skulls of these two people.

Planck had read some of the mysteries about the Maya when he came, and he was well prepared, including one of the stories about the famous Mayan Crystal Skull Incident.

Some of the people in the book who are superstitious about the mysterious legend of crystal skulls claim that there are 13 crystal skulls on the earth, and they are sacred relics of the Mayans with extraordinary powers. If these 13 crystal skulls are put together, they can reveal the secrets of humanity's past and future.

Planck, of course, will not fully believe in these wild histories and scientific magazines, he came here to seek truth and facts, but he can't disbelieve it, since there is a wild history out, then it means that there are still some theories in these things, and the truth may be closed behind this stone door.

The more Planck thought about it, the more he felt that the truth was getting closer and closer to him, he was a little anticipatory and excited, his tongue was a little dry, the temperature here was too high, as hot as the Sahara Desert.

"Crystal skulls—" Planck narrowed his eyes as he looked up at the sparkling quartz and crystals in the sky.

He searched back and forth on the shore for a long time, but he never found anything shiny, there were no crystal skulls, he tried to get into the water, and swam to the stone walls, where he found not only quartz and crystal, but also valuable diamonds, if a team of explorers came here, he would probably be crazy with joy.

It's just that Planck has no interest in these diamonds, and he hasn't had any clues about the crystal skull after looking for a week, even Planck, who has always been very enthusiastic, is a little depressed at this time, and if he can't find the crystal skull, it's a question of whether he can leave here.

He also tried to use his communication equipment to contact the students outside, but there was no movement inside except for the sound of electricity, it was like a huge magnetic field, and the signal was blocked.

Just when Planck was in low spirits and at a loss, that strange voice appeared in his head again.

"My child, throw yourself into the arms of God!"

Planck patted his head, and somehow, he had been hallucinating and auditory hallucinations since he came here.

At this moment, a quartz stone fell from the stone wall above his head, and Planck tilted his head to dodge, and the stirred water splashed on Planck's hot face, watching the quartz stone slowly sink. Planck had an idea.

Planck suddenly understood something, and plunged into the water, and dived down, ignoring the cold water, Planck knew that he would definitely get sick if he was hot and cold, but it still couldn't dampen his determination.

The water of the underground lake here was unexpectedly clear, and the water was not very bright, but a faint light could still be seen flickering in it, and Planck swam towards the light, and the voice sounded in his head again, ancient and sacred.

"Come into the arms of God, my child, come here, my child!" Planck knew that he might be in great danger now, but even if he stayed here forever, he would have to find the crystal skull that would lead to the door of truth.

"Come on!" Planck thought in his mind, the further down he went, the colder the lake became, but the brighter the light grew, and Planck was not far from the birthplace of that light.

Fifty meters......

Thirty meters......

10 meters ......

"Uh..."Every time you dive ten meters, it is a serious test of Planck's body, when he was in the Huaxia branch, he also won a prize in the diving competition, although he was not the champion, but compared with the freak of the Andrew family, it was already very good, and the two of them broke the record of the branch at the same time.

"It's almost there!" Planck reached down, the pressure of the water pressed against his chest, his lungs had begun to accumulate water, and he was likely to suffer from pulmonary edema, and his lungs looked like they were about to burst.

Planck kicked down with the last of his strength, and reached the crystal skull with his hand, and the crystal skull suddenly woke up and bit down on Planck's hand, Planck was surprised and delighted, and quickly took the crystal skull upstream.

Thump......

Planck put his head out of the water, coughed, and then breathed sharply, and let his body float on the surface of the water weakly, he was now dizzy, weak, breathless, and his chest ached as if he had been beaten with a stick.

Planck took one last glance at the crystal skull in his hand and fell asleep.

......

"Damn, that kid has been missing for twenty-four hours now, and now I'm sure he's in trouble!" Morgan puffed out a puff of cigarette as it got dark, and the rest of the people leaned together, and they were roasting over the fire, eating barbecue, and chatting.

Let's talk about the interesting story in the headquarters, which kid has a crush on which beautiful girl, and the confession in person was rejected, the reason is that the girl is actually a lily, and a guy from the scientific research department invented a new alchemy weapon, but on the day of the test, the weapon was only broken because it fell to the ground......

"It's useless to be anxious now! The headquarters will only start to send rescue unless the stranger has been missing for three days, and now it's only one day, what is there to say! Carrying out a mission is a dangerous job!" Alan took a bite of barbecue, he had seen too many stories of students who lost contact first, but survived.

"Three days, those kids are going to be gone in three days!" Posey pointed to the poor group of unlucky people beside him, who couldn't stop the field trip because the group leader had lost contact, and a special opportunity from headquarters took them out three days later.

Not being able to carry out the practical mission means that they will not be able to get the grade points of this operation, and they will really come to the ruins for a three-day tour.

"There are so many mission departments in the world, it is impossible for everyone to lose contact, and the headquarters will send people directly, so there will be no shortage of people in the headquarters!" Alan sighed.

"This is obviously just the periphery of the ruins, and there is still such a big distance from Boulder City and the pyramids, how could it suddenly disappear, and it doesn't look like it was attacked by aliens and strange beasts!"

Morgan wondered, according to Adam's line, they were supposed to come here first than Planck's group, but they encountered an attack on the way, so they were delayed, but they didn't expect that in the end Planck people were gone.

"Tomorrow, I'm going to go into the periphery of the ruins, to see where the wind is, to find Planck's whereabouts, and if I can't, then I'll have to let these kids go back the way they came!" Morgan was the agent in charge of the mission, so he had a lot of right to speak.

"Alright, man!" Percy thought likely, at least Morgan wasn't going to act at night.

......

"Wake up, child, and return to the arms of God!"

The hoarse and divine voice resurfaced in Planck's mind, and in the darkness, Planck saw the crystal skull talking to him, looking strange and terrifying.

In a daze, Planck opened his eyes, he was now on the shore, his head tilted to the side, right in front of the crystal skull, Planck was stunned, and got up from the ground, his limbs were sore, his chest ached, and his head was dizzy.

"Sneeze ......"

Planck sneezed, snot flowed out, he touched his head, it was piping hot, and now it was certain that he had a cold and fever.

Holding the crystal skull, Planck made his way to the gate in the distance.