UK version of the Norwegian show about a surgeon who is determined to save his dying wife to the point of agreeing to treat criminals and others for cash in his highly illegal secret underground clinic.

Daniel Milton is a successful surgeon, whose world is shattered when his wife Beth develops a fatal degenerative disease. After conventional treatment options run out, Daniel is forced to partner with the lonely yet resourceful Lee to start a literal 'underground' clinic, situated in the vast labyrinthine network of tunnels deep below Temple tube station.