A nun had been collecting donations from the crew on the ship the Helen Evans when she is run over and killed by a reversing truck. When her handbag is accidentally opened a quantity of heroin is found. It turns out the nun was Carmen White, an ex con from the United States. They find that she goes collecting each time the Helen Evans, owned by Enzo Morell, arrives in port. King works with US authorities to find out about the smuggling ring but he is dating Morell's daughter, Marie. However, Fox and King cannot believe he is involved. Events escalate when one of the men involved is shot by Grainger, the investigator from the USA.
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