There is no lower rank than cabin boy on the warship Invincible. But Dantar knows he is important, because anyone who threatens his life gets turned into a pile of ashes. The Invincible has been attacked, and all seems lost. Dantar’s only escape from his enemies is through the foul-smelling sewers of Savaria. Velza’s plans to save him are soon thwarted by three enormous dragons threatening to set fire to the city.