Knock Knock

South London gangster Perry Smith doesn’t scare easy but when four of his associates are brutally ripped apart by a demon called Amy he calls in Jack Nightingale. Nightingale thinks it’s a wind-up - the gang contacted the demon via an iPad app whilst on holiday. But before he knows it he’s on his way to Fuengirola with his assistant Jenny McLean to send Amy back to where she came from.