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When a young woman steals a poison, from a laboratory, her sister hires Nick to find her. Finding out her boyfriend is an ecological activist adds new demention to the case. As does the revelation that the poison is actually a biological weapon.

Dunford accompanies Nick during jazzman's death investigation. He wants to collect materials to his the newest book.

Nick's ex-partner, Chaffey, needs his help to catch a drug lord, who is being helped by a Customs official. After, Nick must decide whether to stay on Key Mariah.

Linda Stone asks Nick and Sylvie for help. Her husband who died two years ago, reappears and is killed. His name wasn't Stone, it was Streeter. Linda realizes that her husband had feigned his death two years ago and took a new name. A clue leads Nick and Sylvie to a yacht club. They posed as a married couple and Sylvie teases him by making as if Nick is very silly. Nick gets revenge while they are at a clinic. But suddenly Sylvie is in danger.

Serial killer (Pike) stalks Sylvie.

A strange woman hires Nick to stop her husband who wants to murder her. However, after some investigating, Nick finds evidence that she might be insane. But what if she isn't?

Sergeant Olli Porter from Philadelphia arrives to Mariah Key chasing the killer. He asks Sylvie and Nick for help.

Ian finds a young woman who had escaped from a man and had fallen from the wharf. She hasn't any money, no identity card and she doesn't know who she is. Ian asks Nick and Sylvie for help.The only leads are a small bottle of perfume and an inscribed piece of paper.

Nick and Sylvie are hired by a wealthy, but unscrupulous lady, who owns several slums in Key Mariah, to investigate her son's fiancé. However, they soon find themselves having to protect the woman from a dangerous young man who blames her for the death of his father.

After an elderly friend of Nick's is conned out of her life savings, Nick comes up with a plan to con the money back from the man responsible. Despite help from Sylvie and Spider, the plan gets dangerously out of hand when it starts to include a local mob boss and the con artist's former partner who has her own score to settle.

A beautiful model is being extorted by a sleazy private detective with compromising photos, so she asks Nick to help retrieve them. When the detective turns up dead, the model becomes the key suspect.

Ian's ex-girlfriend arrives to Mariah Key. She claims that she needs money to pay her debts. She wants Ian to sell the rights of their band's hit song.