Detective Inspector Ray Lennox has fled to Miami to escape the aftermath of a mental breakdown induced by occupational stress and cocaine abuse, and a harrowing child-sex murder case back in Edinburgh. But his fiancée Trudi is only interested in planning their wedding, leaving Lennox cast adrift, alone in Florida.

A coke-fuelled binge brings him into contact with another victim of sexual predation, ten-year-old Tianna, and Lennox flees across the state with his terrified charge, determined to protect her at any cost.