Bill is a fifteen-year-old runaway evacuee, and he's finding that surviving on the streets of London is pretty easy, thank you very much. He's fed by a local cafe owner, he earns some cash as a barrow-boy in Covent Garden and sleeping in the Underground air-raid shelters is cosy - if a bit smelly. Things get more complicated for Bill with the arrival of Julie. She's a runaway too, and although she's a bit posh, she's just as determined as Bill to stay free of interfering parents and 'the social'. But although it's fun for a while to duck Jerry missiles and camp out in bombed-out houses, the reality of living through the Blitz quickly begins to set in. Winter is coming, and Bill and Julie will discover that playing at being grown- ups can be a very dangerous game....