There’s a heat wave in Boston in the summer of ’66. The War in Vietnam is ramping up, racial tensions are high and the hippie counter-culture is causing trouble everywhere. Lieutenant Jody Brae may not like politics, but he knows what it’s like to be an outsider. He was raised in the Roxbury slums, he experienced combat in Korea and his partner Trevor Harrigan is the only black detective in the city.
With PTSD-related amnesia, Detective Brae has all but forgotten the War until he and Harrigan come upon a car wreck on a dark city street. The Fire Department rescues the driver before the vehicle bursts into flames but he is already dead from a gunshot wound. When a Captain hands Brae a small object that was found on the victim, Brae immediately recognizes it as a military pin from his Marines unit.
Only a day later, a body is found under a train bridge, then another in an alleyway. As the murders continue to mount, Brae is shocked to learn they are all men from his platoon in Korea. Then one night, while Brae is dining with his girlfriend Ruth, a Marine he thought had been killed in action walks up to the table. Sergeant Travis Kemp says he is in town for a veterans’ reunion at the Lenox Hotel but when Brae reluctantly goes, Kemp isn’t there.
After a body is found in a hotel room rented under Kemp’s name, he becomes the primary suspect. He is on the run for over a week before showing up at Brae’s doorstep with a bullet in his leg. That night Kemp recounts a horrific incident from the War that Brae has long suppressed. Brae’s amnesia is finally overcome and he realizes who is committing the murders and why. But it might be too late because the killer has just kidnapped Ruth.
The search leads the Detectives to Whiskey Point, a tree-covered cliff in the heart of the city where Brae first met the killer thirty years before. And there, in the howling darkness, the sins of a forgotten crime in a cold Korean valley are at last avenged.