After a harrowing experience failing to save a friend, the once eccentric mad scientist Okabe retreats into a mundane college life, concealing his time-traveling past from friends. Encountering Maho and Professor Leskinen at a tech forum, they introduce Amadeus—an AI recreating memories. Discovering they resurrected his lost friend Kurisu, Okabe is drawn back into a perilous journey of tampering with time's delicate balance.