DI Owen Sheen vowed never to return to Belfast, but he needs answers about his brother's death. He is on loan from London's Met to the Police Service of Northern Ireland, although before he can dig into the past, he must babysit DC Aoife McCusker on her first murder investigation. As the case slides into chaos, can Sheen put his personal agenda aside? And will McCusker keep her job long enough to ensure that this first case is not her last?