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.