When they were children, Sean Devine, Jimmy Marcus, and Dave Boyle were friends. But then a strange car drove up their street. One boy got in the car, two did not, and something terrible happened — something that ended their friendship and changed all three boys forever. Twenty-five years later, Sean is a homicide detective. Jimmy is an ex-con. And Dave is trying to hold his marriage together and keep his demons at bay-demons that urge him to do horrific things.

When Jimmy's daughter is found murdered, Sean is assigned to the case. His investigation brings him into serious conflict with Jimmy. And then there is Dave, who came home covered in someone else's blood the night Jimmy's daughter died. While Sean attempts to use the law to return peace and order to the neighborhood, Jimmy finds his need for vengeance pushing him ever closer to a moral abyss from which he won't be able to return.

A tense and unnerving psychological thriller, Mystic River is also an epic novel of love, loyalty, faith, and family.