Nurse Yuria, working her shift at the hospital, suddenly collapses one day while on duty, gripped by intense abdominal pain. Clutching her stomach, she struggles desperately to endure the agony. But the pain doesn't stop there—it spreads, accompanied by overwhelming nausea. Forced to rush to the restroom, she vomits, only to be horrified by the contents. Realizing something is terribly wrong with her body, she finds herself with no memory of what could have caused it. Then, a second wave of pain strikes, and from her mouth emerges a grotesque, unnatural presence. Its true form: a parasite capable of controlling human thought. Will Yuria be able to confront the creature nesting inside her and reclaim herself?