Without knowing why, two recovering hospital patients feel an compelling urge to kill each other, in this Korean thriller from directors Sang-hwa Kim and Owen Cho. Set in 1984, apparent would-be suicide Min Ho (Cheon Ho-Jin) wakes up in hospital, where, despite the efforts of the doctors and his nurse (Hyo-rim Seo), he sets about trying to finish the job. But things soon change when a new patient is brought in to share his room. The sight of an oblivious and paralysed Sang Eob (Hae-jin Yu) stirs up vague, troubling memories in Min-Ho, and without understanding why, he feels an overwhelming need to kill his roommate. Over the coming weeks, as Sang Eob slowly recovers, the hatred rising up in the two men reaches boiling point, and it doesn't take long for their claustrophobic hospital room to become the focus of a deadly confrontation.