Alvin is a good man. He works with dysfunctional teenagers, and where everyone else sees apprentice career criminals, he sees hope. No-one has ever taught him to accentuate the positive; his mind is simply built that way. He adores his family: Karen and the children are the centre of his world.

So when he finds that one of his few teenage success stories has wound up working in a massage parlour, he knows he has to help. He’ll pop in for a little chat – that’s all it will be. But try telling that to anyone else. Karen’s not convinced, and maybe she has her reasons to be suspicious. Alvin finds that one mistake, arising from the noblest of motives, will propel events out of control.

Now cast adrift, Alvin’s only allies are the teenagers everyone’s given up on. They’re great at supplying dodgy DVDs and ringtones – but can they help him get his life back?