Dive into London's most dangerous crime scene - the River Thames.

A police diver whose obsession with the job has made his home life implode.
A high-flying detective recently thrown out of the CID.
A case that could get them both killed.

Police diver David Cade lives by a simple rule: pull out the bodies and move on. Naomi can't abide that. Her whole career, she's wanted to fight the good fight. But circumstances have sent Naomi to the Marine Police.

Then they discover a dead girl, bloated and broken on the surface of the Thames. And then another.

Each time David pulls a new body out of the water, he fears it's his estranged fifteen-year-old daughter Lex. She's gone missing after they had a fierce argument and hasn't been in touch since.

The dead girls all have the same nightclub stamp on the backs of their hands - the same one David's daughter had the day she disappeared.

A briefcase is discovered in the same stretch of water, and suddenly the higher-ups at CID, including Naomi's rival, Detective Chief Inspector Shannon Baines, start showing an interest.

Clearly something big is happening.

David and Naomi need learn to work together if they're going to solve the dead girls' murders and find Lex. Then they uncover something that will threaten to blow the case apart - if it doesn't get them killed first . . .