Ethan Hale enters an Eerie Realm, trapped in Serene Peak Hospital. Strict rules, disappearing patients, deadly missteps. After awakening SSS-Rank Talent "Infinite Simulation", Ethan previews survival paths, deciphers rules in hospital spaces, saves Nora Reed, and uncovers the truth behind the hospital. Faced with Director Croft and traps, he teams up with others to reverse rules, escape, and counterattack.