When the body of an estate agent is found in an upturned kayak on Mirror Lake, DC Ffion Morgan quickly realises the accident has been staged. There's no love lost between Ffion and estate agents, but who hated this one enough to want her dead? Over the border in Cheshire, DS Leo Brady has his own property nightmare on his hands. The Hill is the kind of place where owners relish people gawking at their multi-million-pound homes - but now someone is breaking and entering their houses one by one. Ffion and Leo are about to learn that people will pay a high price to keep their secrets behind closed doors. And even on the most desirable street, there's a dark side.