Two people awaken in a hospital and must cooperate to escape a nightmarish disaster. They explore the mysteries within the hospital, search for documents, investigate, and work to uncover the truth behind the incident. Whether to hide from or fight the inhuman creatures before them is up to you. A gas explosion accident occurs in the building, leading you to be transported to the hospital for rescue, but unfortunately, this hospital is headed toward an unexpected development. Facing a hospital turned into a monster's lair, where sanity and body are gradually eroded in this environment, you search for a way out while accompanied by one woman. You must confront various mysteries within the hospital, uncover the truth of the incident, and find a way to escape from the hospital.

On his way home from work, a sudden downpour started, so a young man was taking shelter from the rain in front of a rundown apartment building. That's when he caught sight of a beautiful woman standing in the shadows beyond the half-open door— and he found himself irresistibly drawn to the scene.

Burned out from studying, a man checks into a hospital in search of rest. But this place is far from ordinary. What begins as a quiet stay soon slips into something surreal - -where the line between reality and nightmare starts to blur. With every passing night, doubts grow. You must question what's real and slowly uncover the hidden truth buried within these halls. Only by surviving all five nights of despair will the full picture come into view.