Yukiteru Amano is a 14-year-old loner who observes life and jots down the events on his cell phone. His only friends are Deus Ex Machina, the God of Space and Time, and his assistant Muru Muru. Deus transforms Yukiteru's phone into a Future Diary, capable of predicting the future up to ninety days. Yukiteru discovers he and eleven others are part of a survival game orchestrated by Deus. The aim of this game is to eliminate the other diary holders, the winner succeeding Deus as god and can prevent the Apocalypse.