Dr. Bunnakit, a provincial hospital medical examiner, suspects homicide in what appears to be a suicide case. His findings draw dangerous attention, and an intruder threatens him to alter his report. When a prosecutor friend vanishes, Dr. Bunnakit secretly investigates, leading to Tan, a man who denies involvement. Together, they team up to uncover the real killer.

Following the events of Manner of Death, forensic pathologist Dr. Bunnakit (Bunn) relocates from northern Thailand to Bangkok with his boyfriend, Tan, seeking a peaceful life. The tranquillity is shattered when Dr. Bunnakit discovers a murder victim with only one kidney, plunging them into a dangerous investigation involving illegal organ trafficking.