A professional diver is found dead in an underwater cave. Although the death is classified as accidental, Julia isn't as sure and investigates on her own. Will she find a murderer or is she next on the list?

When medical internist Julia Fairchild receives an invitation to Paris from her long-distance beau, Josh, she packs a bag, grabs her sister Carly, and jets off for the City of Lights. But once they arrive, death and suspicion take the place of champagne and escargot. Josh’s business partner is dying in the hospital, and the police are convinced Josh is behind it. Naturally curious and driven to seek justice, Julia jumps at the chance to clear Josh’s name—but he doesn’t seem interested in proving his innocence.

Scuba divers travel from all over the world to visit the little island of Bonaire, with its crystal clear waters and a host of beautiful marine life. After three years in the “Diver's Paradise”, divemaster Boone Fischer thought he’d seen it all, but on a routine afternoon dive, he spots something that will turn his tranquil life upside down. 

Coming from scandalous Florida treasure hunters and drug smugglers, Sloan McPherson is forging her own path, for herself and for her daughter, out from under her family’s shadow. An auxiliary officer for Lauderdale Shores PD, she’s the go-to diver for evidence recovery. Then Sloan finds a fresh kill floating in a canal - a woman whose murky history collides with Sloan’s. Their troubling ties are making Sloan less a potential witness than a suspect. And her colleagues aren’t the only ones following every move she makes. So is the killer.

Robbie Steinhardt lives a peaceful life. A fixture of his small alpine village, he tends cattle, minds his own business, and doesn’t dwell on his former life and the family and lover he left behind—back when he was Mac Dekker, CIA. But when he learns his son Will died following in his footsteps, he needs answers. What mission took Will up into the alpine heights, and why is Ilya Ivashka on the same trail? Ilya—his close friend, his rival in love. Ilya, who framed Mac for treason and sent him into hiding.