CAN YOU EVER REALLY KNOW THE PEOPLE NEXT DOOR? Cowerworth is the picture perfect neighbourhood. Its manicured lawns and low crime rates make it the ideal place to raise a family. But in a quiet suburb, someone is always watching. And all eyes are on the couple who have just moved in. Marcus and Gina are everything you could want in neighbours: polite and friendly. They seem to be the perfect fit. Except Marcus has a secret. And you’re his next victim. Irreverent, dark and addictive, KNOCK KNOCK is a nail-biting, spine-tingling and thrilling ride, with a KILLER twist!