Angelo attempts to extradite a wanted murderer from his island kingdom off Sicily and return him to face trial in America.

A disused hospital in an area of sickness and poverty involves Danny and Angelo in the running down of the source of a drug-smuggling racket.

When Franco Garoia sends a St Valentine's card, it is not a token of love but a sentence of death. Scipio goes to Puerto Caragua, a small republic in Central America, to leave a Valentine with Garoia. But though the killings continue, it seems that the St. Valentine's man no longer exists.