When a number of rich men come to a mysterious end, and a young investment banker dies of a supposed heart attack, FBI agent John O'Hara believes it is the work of a cold-blooded killer. Turning his eye to the only witness - the young banker's beautiful and secretive widow - O'Hara thinks he's closing in, but he's not sure whether he's pursuing justice or his own fatal obsession.

"The twelve central characters of this multi-voiced novel lead vastly different lives: Amma is a newly acclaimed playwright whose work often explores her black lesbian identity; her old friend Shirley is a teacher, jaded after decades of work in London's funding-deprived schools; Carole, one of Shirley's former students, works hard to earn a degree from Oxford and becomes an investment banker; Carole's mother Bummi works as a cleaner and worries about...