Anya is enjoying a relaxing bath when she hears a noise in the roof. Through the open bathroom door she sees the attic hatch swing open and a masked figure drops to the floor. Thirty seconds later Anya is dead. Across town Anya's old school friend Julia sees an online video of a masked figure climbing out of an attic. She suddenly realises why the footage is eerily familiar: it was filmed inside her house in a luxury gated community designed to keep intruders out. Why would a stranger target Julia? Unless of course it's not a stranger at all.