No one suspects a thing. When your daughter shows you a video of a masked man climbing out of an attic, you initially ignore her.

But then you recognise the carpet, the stairs and the paintings. Your heart skips a beat, because the footage was filmed inside your hous. Someone wants revenge. You’re certain no one could access this luxury gated community, designed to keep intruders out.

But then the second video arrives – the same as the first – and you really begin to panic. Everyone is hiding something. Could someone be living in your attic? Why would a stranger target you? And what if it’s not a stranger at all?