Three years ago, FAN (LAU Ching Wan) had a schizophrenic breakdown and killed his wife (Michelle YE Xuan). He later attempted to commit suicide but was unsuccessful, and was eventually sentenced to rehabilitate in a psychiatric facility indefinitely.
Dr. CHOW (HUANG Xiao Ming) is FAN’s psychiatrist. He believes FAN is cured after 3-year treatment and is alone in opposition to all doctors’ objections to discharge FAN. After releasing from the facility, FAN faces discrimination and misunderstanding and once again finds himself at the brink of collapse. One night, he mistakenly kills a drug addict on impulse. He is driven to despair and comes to Dr. CHOW for help.
Having thought about it, Dr CHOW fears his career will be wrecked if it is uncovered and therefore helps FAN abscond. The concealment of the truth subtly snowballs into chaos as it triggers media criticism and attacks due to his missing murderous patient. In order to redeem himself, CHOW decides to cure FAN with a confined treatment outside hospital secretly. In the course of the treatment, their strain is intensified and later becomes a face-off between CHOW and FAN. Once and for all, can CHOW make his way out of this bottomless whirlpool?