Tygo, a locksmith's son, is forced by the Nazis to loot abandoned Dutch homes for valuables. Known as 'the Ferret', he's despised by everyone, but it's the only way he can keep his family alive.

But when he discovers a girl with a diamond in a chimney, he refuses to give her up.

Instead he turns spy and trades the jewel for information about Hitler's ultimate weapon. Can a ferret become a hero? He has one shot to stop the war.