Two students coming home from a drunken night out see something strange in the river. It is a young woman's body. Hours later, a second young woman's body is discovered on another stretch of the same river. DS Ava Merry and DI Jim Neal are assigned to both investigations. And they're joined by a new detective, Tom Knight. Soon a connection is found between the two dead women. A list of “victims” is discovered in one of their flats. Who will be next and what really happened to the women on this sinister list? In a thrilling conclusion, Jim Neal fights for his life as the two detectives struggle to solve a complex case involving people with secrets that may prove fatal.