Dr. Steven Bishop is taken to the hideout of Frank Dillon and his gang to treat the wounded Joe Madison. Joe's nurse sister Nora Madison is also taken. Dillon tells Bishop that if Joe dies, he will be killed, but Bishop knows he will be either way. Joe dies, but Nora and Steve conceal it from Dillon and send a plea for help in a prescription that Bishop writes in Latin.
Eleanor and her parents are hunting big game, acompanied by her wimpish fiance.
Occupants of a London boarding house become suspects as a string of murders are discovered.