The plot is like this

This line is at the end of the first season, Mayuri didn't slap the murderer, the murderer gave up saving the assistant, the world stayed at the beta line, the beta line was stunned, and it didn't look like the murderer (no confidence, No 2) The end of this line is the Third World War.

The seniors in the lab of Assistant University, Loli Niang and the professor, invented AI and copied the memory of the assistant before he died. This is actually a trick of the professor. After losing it, he was brainwashed and controlled to find the professor of that era and told him everything about the future. Their ultimate goal was to capture the time machine in 2011.

It has been a year since the assistant died. In the summer of 2011, Mayuri decided to go back to a year ago with Lingyu, but in this world line, he would always be blown up by helicopter missiles (same as the α line), so the And Loli Niang completed the jumping machine according to the hint of fierce truth, but why did you go to 2036, saw the world war in 2036, and in order to return to 2011, jumped 3,000 times with each jump for 2 weeks. In 2011, when analyzing the world situation, the United States and Russia, the United States is the professor's side, and it has been controlled after repeated experiments many times, but there will still be helicopters to blow up, so I thought of the organization on the Russian side, and the key point is AI. The assistant was hijacked by Russia, and it was sent to DLine in the past (not in the form of Mail, which would not be discovered by Sean) to delete the AI ​​assistant. Mayuri successfully went to call Shiji in 2010. In 2010, Mayuri called Shinichi. Slap the slap (the murder is really cheering), at this time the world line should move a bit (the animation did not explain), the future real murderer sent himself a plan to deceive himself, and successfully walked to the gate of fate. But the time machine ran out of fuel, and after being drifted for a long time, the fierce truth in 2025 (actually still on the beta line) took the time machine to find Mayuri and Lingyu. In fact, it doesn't matter here, because when the murderer really deceived himself, the timeline will reach the Steins Gate line. Everyone will be back to normal.

In addition, the most abusive thing in the eighth episode is that the world line changed to the alpha line, and Fierce became decadent because of Mayuri's loss. The assistant found out that Fierce came from the beta line, so he let Fierce go back, because the assistant was pressing Before clearing the first Dmail, I came in and confessed, but I didn't press to cancel, so I didn't go to the beta line. The assistant sent Dmail to myself "Don't go in", and stayed for a few seconds, so I went in and pressed.