Nobody likes The Complaints—they're the cops who investigate other cops. It's a department known within the force as "The Dark Side," and it's where Malcolm Fox works. Now he's investigating a dirty cop named Jamie Breck, but there's more to Breck than anyone thinks...

Nobody likes The Complaints—they're the cops who investigate other cops. It's a department known within the force as "The Dark Side," and it's where Malcolm Fox works. He's a serious man with a father in a nursing home and a sister who persists in an abusive relationship, frustrating problems about which he cannot seem to do anything. Then, in the midst of an aggressive Edinburgh winter, the reluctant Fox is given a new case. There's a cop named Jamie Breck, and he's dirty. The problem is, no one can prove it. As Fox takes on the job, he learns that there's more to Breck than anyone thinks—dangerous knowledge, especially when a vicious murder takes place far too close to home.