Set within a hospital, located on the outskirts of town, mysterious phenomenons occur in sequence around a nurse (Kaho). The nurse is suspected as the cause for some horrible cases and finds herself in danger.

The Kumagawa Hospital which is located in the outskirts of town. Ogami Runa joined as a nursing staff 2 weeks ago. One day, after turning of the lights, her fellow colleague, Suzuki Ayako is terrified out of her wits when a woman dressed in a school uniform (sailor) with blood dripping all over her, appears before her.

A few days later, Runa's childhood friend, Sakai Aimi who works at the movie production company, calls her out for a meet-up. Ever since she was a child, when she saw the ghost of her dead schoolmate on her way to school, Runa realises that she could sense and see the ghosts around us. Bullied by her other classmates, Aimi is the only one who had befriended her.

Due to her ability, Runa always refuses to listen to talks of ghosts sightings by other nurses and patients. Amidst all these, the medical intern Kumagawa Asahi, whose father owns the hospital, has always been curious about the mysterious old hospital wing's top floor.

One night, Runa goes to the old hospital wing to fetch some supplies, when she hears a voice calling out her name. Entranced, Runa follows the sound and goes up to the top floor. She bumps into the wall at the end of the corridor, and the sound seems to come from within. Perplexed, Runa stands there contemplating the wall, when all of a sudden, a door appears before her eyes...