Fred Waugh

Joe Mannix is approached one evening by a woman named Lisa Ralph, who says that she believes someone may be trying to kill her, possibly because she has a valuable manuscript that she inherited from her late father.

Joe goes on a fishing trip and his car breaks down close to a hideout for syndicate hoods. Frank Langella plays an assassin in town for a big hit.

An old friend asks Mannix for help as his daughter has been kidnapped. When he arrives the friend has changed his story, saying it was mistake.

April and Mark are shipwrecked on an island ruled by Ghengis Gomez VIII and he punishes them for trespassing.

Mark inherits a haunted English castle and becomes a target for his relatives who want to inherit it. April tries to elude a THRUSH killer in the castle.

April and Mark go undercover in the world of music to protect a prince who will be assassinated when a certain song is played to trigger an avalanche.