"Host" transports audiences to Pinijkhun Reform School, an isolated all-girls facility situated on a remote island. Ing, a new student, quickly discovers the institution's singular, unforgiving rule: absolute obedience. The school operates on a strict hierarchy, placing the principal's favored student at the top, while Ing finds herself at the very bottom. Soon after her arrival, strange and unsettling incidents begin to plague the remote school. As these bizarre occurrences escalate and pile up, a chilling question emerges, forcing Ing to confront her reality: Is she merely a victim caught in a web of misfortune, or is her presence unknowingly the mysterious cause of the chaos unfolding around her? This intense thriller delves into themes of control and the dark secrets hidden within a seemingly orderly world.