Yun Lei, an ordinary teenager, because his father Yun Tai was originally a Demon Sect Quartet Sect Poison Heart Messenger, he inadvertently practiced Qi Dan ---- Demon Tribulation Pill fifteen years ago. The Four Sects regarded it as a holy relic in the sect and asked Yuntai to hand it in, Yuntai knew that the behavior of the Four Holy Sects was despicable, and handing over this pill would definitely lead to misery. Yun Tai refused to hand over the Demon Tribulation Pill and was chased and killed by the Demon Sect, and while fleeing, he stuffed the Demon Tribulation Pill into the swaddling clothes wrapped in Yun Lei, and the Demon Tribulation Pill was absorbed by Yun Lei when he was still a baby. Yuntai knew that the big thing was not good, if someone knew that the Demon Tribulation Pill was in his son's body, his son would definitely not be able to save his life, so he left Miao Jiang and traveled east to Guangling City to open a medical hall to make a living. Seeing that Yun Lei was growing up day by day, he was very worried that the Demon Tribulation Pill would explode in Yun Lei's body sooner or later, and he couldn't do anything about it, so he had to resign himself to fate. Yun Lei came into contact with the Phantom Spirit Stone by chance, and was activated by a spell in the Demon Sect in the Xianyang Palace, but he encountered the sound of the piano that could suppress the Demon Tribulation. Yun Lei finally met a famous teacher, constantly overcame the demon tribulation, and finally enslaved the demon tribulation in his body and became the master of the demon tribulation. With the power of the Demon Tribulation, he finally killed the Demon Capital......