Sid Lowe rules an entire London region with an iron fist. When one of Makepeace's informants, Wee Jock gets beat up by Lowe's men, for once it is Dempsey who is the more reasonable one and has to restrain his partner.
Sid Lowe runs a protection racket that maims and even kills to keep people in line. When he dares to kill a man under arrest by Dempsey and Makepeace, she enlists a long-time acquaintance, Wee Jock. Enraged by Lowe's attack on Jock, roles are reversed for the two cops: Dempsey must see that Makepeace does not go too far in her vendetta against Lowe.—jeaneva