Gottlieb Biedermann can’t believe what he’s reading in the newspapers – another day, another arson. The story is the same every time: a stranger at the door, usually selling something, is welcomed in, inexplicably offered a bed for the night, and the next day the house is in flames. But not to worry — he has everything under control. Husband, homeowner, entrepreneur, Biedermann believes himself to be the ideal citizen. Certainly, he could never be duped. But when petrol drums appear in his attic, will he help wire the fuse?