"The Evil Within", known as "Psycho Break" in Japan, is a survival horror game where Detective Sebastian Castellanos, along with his partners Joseph Oda and Juli Kidman, investigates a mass murder at Beacon Mental Hospital. They are suddenly pulled into a nightmarish, alternate reality powered by a machine called STEM, created by a disturbed scientist named Ruvik. Sebastian and his partners are trapped in this shared consciousness, facing monstrous creatures and warped environments, all while trying to survive and uncover the truth behind STEM and Ruvik's motives.