Three condemned criminals, a forger, an uncouth (but efficient) assassin, and a disgraced paladin in possession of a dead demon, are given a second chance. If they can travel to the neighbouring country and find out how the terrifying clockwork boys (deadly manufactured beings, more siege engine than creature) are made and how to stop them, they'll get a pardon. It's not much of a chance. They all think it's going to be a suicide mission. They are joined on their journey by a scholar, all innocence and preconceived ideas.