Dr Kilroy Frost manages to separate his sexual desires from his professional life as a general practitioner. He volunteers as a sub at his anonymous BDSM club when the urge arises, but struggles with self-disgust afterwards, leading him to a cycle of heavy drinking and tranquilliser use. His life takes a turn after he is saved from a hotel fire by firefighter Todd Hansen. Their paths cross again at the fire station and later at the hospital on the day Kilroy learns of a homicide investigation linked to a member of his sex group, raising questions about his safety and what he should disclose to the police.