Danganronpa: Post-Mortem Memories follows the story of Mayumi Noriko, the Ultimate Judge, as she partakes in a deadly killing game after witnessing the deaths of eight other Ultimates. She must uncover the secrets of both the wicked Headmaster Monokuma and the serial killing she witnessed, all while surviving the Class Trials, where she and the other Ultimates students must face off with the Blackened, one of the students who has murdered another, and solve their crime.