A silent transfer student arrives at Gekkoukan High School and settles into a dormitory on Tatsumi Port Island, only to discover the Dark Hour, a hidden span of time that appears at midnight when most people transform into coffins and the ordinary world twists into something monstrous. During this concealed hour the school warps into Tartarus, a towering labyrinth crawling with creatures called Shadows. He joins SEES, the Specialized Extracurricular Execution Squad, a group of students who confront the Shadows by summoning their inner Personas with a gun-shaped device known as an Evoker. Alongside teammates like Yukari, Junpei, Akihiko, and Mitsuru, he balances the routines of daily school life, friendships, and exams against the dangers waiting in the Dark Hour. As the group climbs Tartarus and battles powerful Shadows that stir on nights of the full moon, they begin to uncover the origins of this cursed hour.