A self-described mad scientist attends a lecture on time travel, stumbles upon the dead body of a familiarly unfamiliar woman, and discovers that his text messages are no longer bound by the rules of space and time.
Okabe takes his experimentation to the next level by texting the winning lotto numbers back in time, but he fails to consider how his actions might alter the present - or the future.
The latest experiment for Okabe and his lab mates leads to the disappearance of one of their own. Next, they'll attempt to use their time travel technology to make a young boy's dream a reality.
Okabe grows concerned over the drastic changes his experimentation is causing, and the IBN-5100 disappears from the lab. The only hope for finding a replacement rests upon the delicate shoulders of Feyris the cat girl.
The part-time warrior from downstairs tells Okabe about the search for her missing father. Meanwhile, the aspiring mad scientist is troubled by a mysterious text message.
Tension builds at the Lab when Makise and Suzuha both show up for the party, but that's just the beginning. As the night draws to a close, armed thugs - led by a familiar face - come looking for the time machine.
Okabe, desperate to prevent the tragedy he's already seen happen, summons the courage for a daring Time Leap. Can he save the life of his oldest and dearest companion?
Despite his many attempts, Okabe is unable to prevent the death of Mayuri, so he turns to Makise for help solving the riddle of time travel. Later, Suzuha's true identity is revealed
Suzuha reveals the orgins of SERN's future totalitarianism. While she continues her work to destroy the organization, Okabe and Mayuri continue the search for Suzuha's father.
After the change in divergence fails to have a lasting effect, Okabe and Kurisu set out to further manipulate time in the hopes of gaining an IBN 5100.
In a further attempt to rescue Mayuri from her fate, Okabe reveals Ruka's past to her. Ruka must make a difficult decision that might change her entire life.
Okabe must make a time leap in order to save Moeka from herself. He realizes that all is not what it seems as Moeka's shady behavior leads him closer to the IBN 5100.
With the help of Kurisu and Moeka, Okabe attempts to get closer to the IBN 5100 and the mysterious FB. As he closes in on SERN's network, he realizes that the path to victory will not be without additional sacrifice.
Okabe has one final chance to travel back in time, set everything right, and save the girl he never even got to love. His mission is vital, but it may mean the end for the mad scientist.
