"This is the story of the 'future' that could not be saved." December, 2010 - Beta Worldline: At the end of his journey through countless worldlines filled with untold sorrows and hardship, the protagonist, Okabe Rintarou, sinks into despair and abandons all efforts of saving "her". As his friends grow concerned for his well-being, Okabe immerses himself in the lifestyle of a serious student in a desperate attempt to push past his guilt and grief. He attends a college seminar for extra credit while still struggling with trauma, where he comes across two scientists that belonged to the same school and research team as "her". After he publicly defends their work against skepticism during a presentation, Okabe is invited to be a test subject for a research project titled "Amadeus"— an experimental AI which uses digitized memories as artificial intelligence avatars, one containing none other than "her" memories. But little did he know that the project would soon draw him back into that very world of dark conspiracies he had strived to avoid. The story is inspired by the "Epigraph Trilogy" light novels and other various drama CDs.