On a summer night, an attractive woman hurtles north in a blue Peugeot with an address in her pocket, while, back in London, a desperate man leaves a late-night phone message on his brother's answering machine. By sunrise, the woman is found in her car, shot, execution-style, through the head. Detective Inspector Annie Cabbot arrives on the scene and discovers a slip of paper in the dead woman's pocket that bears the name of her colleague and erstwhile lover, Detective Chief Inspector Alan Banks. Banks, meanwhile - withdrawn after nearly dying in the fire that destroyed his home - has gone missing just when he's needed most, and has left plenty of questions behind. As Annie struggles to determine if Banks is safe - and what role he may have played in the woman's murder - Banks himself investigates the mysterious disappearance of his estranged brother, Roy. Working from Roy's swank apartment, Banks makes the rounds to Roy's old haunts and slowly inhabits the life of his younger brother, the black sheep of the family. As the trail of clues about Roy's life and associations draws Banks into a dark circle of conspiracy and corruption, mobsters and murder, Banks suddenly realizes he's running out of time to save Roy, and by digging too deep, he may be exposing himself and his family to the same - possibly deadly - danger.
