Everyone’s welcome. But not everyone leaves…

Nick and Amber Miller are splitting up and selling their family home in Apple Grove, Devon. But despite the desirable location, their house isn’t selling. Not a single viewing so far.

When their estate agent suggests an open house event, Amber is worried about her nosy neighbours attending, gossiping about why her house has been unusually difficult to sell.

But Amber has more to worry about than nosy neighbours.
Because thirteen people enter her house that afternoon, and only twelve leave…
 
You’d know if there was an intruder living in your home, wouldn’t you?