Can Detective Superintendent Roy Grace stop a grieving mother from taking the law into her own hands?

A university student is killed in a tragic traffic accident while riding their bicycle. When two of the drivers involved are hunted down by a sadistic killer, Grace knows that the third driver, Carly Chase, may be next.

Carly, a solicitor, believes hiding is not an option and heads to New York to speak with the cyclist's mother. But Grace knows about the mother's underworld connections and that the family will stop at nothing to take an eye for an eye . . .