Joe recalls the day his partner died a year ago, the day the particle accelerator exploded, and everything has changed since then. Barry goes to the bowling alley with his girlfriend and meets Iris and Add.

"Barry, we have a lot of advantages at the moment, the most important thing is to find the reverse lightning." Qin Tian looked at Barry and said lightly, these are also the situations they thought of.

"I also know this, and those situations are enough for us to understand." Barry looked at Qin Tian and nodded, they were in a good mood today, and they also had a lot of understanding and thinking about that kind of situation, otherwise they would have solved it.

"That's right, let's fix this problem quickly! Barry. Qin Tian looked at Barry and said lightly, for the things they want to solve, they also have to think about it.

In the autopsy room, a medical examiner is threatened by a superpowered man to find out who killed Madden six months ago. The state-of-the-art lab received an alarm from the morgue. By the time Barry arrived, the medical examiner was dead.

"There's something quite wrong here, it seems to be the power of superpowers." Barry looked at the situation here and looked serious.

At the scene, there is water everywhere, Barry speculates that it was a hailstone to death, Eddie takes the recording of the morgue and recognizes Mark's voice, it turns out that Mark has come to avenge his brother, and the medical examiner also tells Mark Joe's name, and Joe's life is threatened. Barry told Dr. Wells that he had seen himself, or his alter self, running at speed as he was running last night.

"Dr. Wells, what is it that I have discovered my future self?" Barry looked at Dr. Wells and said solemnly, he didn't expect the situation at all.

"This is the space-time refutation, Barry, you should be clear." Dr. Wells looked at Barry and said lightly, these are also situations they didn't expect, and everything is also in the process of changing.

Iris chats with Add, and Eddie bluntly confesses that he is very unhappy with the way Iris and Barry get along last night, and the two parted unhappily. Barry and Joe are chatting in the car, and Barry says that his relationship with Iris has become a little complicated, and he thinks that Iris has the same affection for him.

Suddenly, the rain is getting heavier, and the weather in Midtown is cloudless on the radio, and Mark is coming. Thankfully, Barry ran away with Joe. Iris's colleagues have found many clues, and they all point to one person, Dr. Wells. He suspected that Dr. Wells had a conspiracy or a different story behind it.

"The situation we are in now is completely different from Linda, Barry is very magical, you can't imagine it, I also think he is quite good." Iris looked at Linda and said lightly.

"These, we also know, in the face of that kind of thing, it is not a situation we have to consider at all." Linda looked at Iris, shook her head, and said.

Iris goes to Barry to chat and asks about Dr. Wells about Stagg's disappearance. Barry said Dr. Wells was a good man. Still, Barry had doubts in his mind. Barry is absent-minded in the lab and tells Sisko and Caitlin about his suspicions. At the same time, Sisko is also suspicious, he goes to the police station to find Joe, and when he leaves, Mark runs to the police station, and before things can get worse, the Flash arrives and borrows the tools created by Sisko to stop Mark.

Sisko tells Caitlyn about his doubts and begs Caitlyn to hold Dr. Wells out of the lab tomorrow morning. In order to save Joe, his boss David is struck by lightning and may be half-paralyzed. Furious, Joe goes to find Mark alone for revenge and entrusts Iris to Barry. Barry meets a colleague in Iris's office, and through some of his descriptions, Barry is somewhat wavering about Dr. Wells. He returns home to find Iris and says he had met Mason. Iris tells Barry that she doesn't think Linda is the right person for Barry. In order to verify whether Dr. Wells had done anything or not, Sisko prepared to conduct an experimental verification.

Something unusual happened. Joe finds where Mark lives alone, where he meets Eddie, who blames Joe for acting alone. At Mark's house, Joe is sucked up by Mark with his superpowers. When he woke up, he had a broken leg and was chained to the deck. And Mark wasn't going to settle Joe right away. He seems to have more intentions. He calls Iris and tells her where Joe is, and Iris decides to accompany Iris to find her. When Caitlin dragged Dr. Wells to the café, it took a moment to turn around and Dr. Wells was gone.

Sisko sees another superpowered man in the lab, and that's when Dr. Wells returns. Sisko then learned that Dr. Wells was the reverse lightning, and Dr. Wells introduced himself as Elber Swan.

"Simon, you know that I have written too much, I originally wanted to let you go, but your situation really makes me quite embarrassed!" Wells looked at Simon and said coldly.

"How the hell did you get here?" Simon questioned Dr. Wells and said lightly.

"That's right." Dr. Wells looked at Simon like a dead man, and he didn't have any emotion at all, and he had tried so much to go back to the old timeline that they couldn't have imagined it.

"Also, did you solve Barry's mother?" Simon looked at Dr. Wells and said coldly, full of anger, Dr. Wells deceived him together, which had already made Simon feel quite bad.

"That's right, I did it, what do you want! Be a superhero? I still want to tell Barry! Or the Flash of the future. Dr. Wells was not polite at all, and looked at Simon, full of sneers and disdain.

"What do you want?" Simon said helplessly.

"Since I told you so much, I didn't want you to live." Wells said lightly.

Dr. Wells was trapped here for fifteen years, and Barry was the key to helping him get back to his own time. With these words, he killed Sisko. Mark sees Barry and Iris arrive, and he decides to kill both of them. At this point he activates the weather, at which point Iris tells Barry what she thinks of him. At this time, the waves are hitting like a city, and Barry must run super fast to reduce the energy brought by the waves. At this time, I had to let Iris know her true identity. Barry returns to his self on the run to see another Flash that night.