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 polite and friendly.
They seem to be the perfect fit.
Except Marcus has a secret.
And you're his next victim. You just don't know it yet.
Irreverent, dark and addictive, KNOCK KNOCK is a nail-biting, spine-tingling and thrilling ride, with a KILLER twist.
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