During the war, children living in a London suburb discovered a network of tunnels underground and turned them into their secret place to play. Decades passed, friends grew up, grew old, had grandchildren and great-grandchildren. And now the company is brought together again by a terrible reason: builders discovered human bones in those same tunnels. Two hands, male and female, severed just in those days when friends were children... There is little chance of solving a crime committed half a century ago. But this meeting forces the old people to renew forgotten acquaintances, reveal secrets kept for decades and, in an attempt to replay their lives, commit new atrocities.