When Diana Woods is found stabbed to death in her kitchen, DS Slater and DS Norman Norman are plunged into another major investigation. The finger of suspicion quickly points at Diana's estranged husband, Ian - a bully who regularly abused his wife. But as Slater learns more, he begins to wonder if everything is as it seems. When a new suspect appears on the scene, it seems that Slater's instincts were right. But the evidence seems just a bit too convenient, and Slater and Norman have to face the possibility that their suspect is being framed - and they could be back to square one.