Half-goblin boy Joseph Grubb lives in Fayt, a bustling trading port where elves, trolls, fairies and humans live side by side. Fed up of working at the Legless Mermaid tavern, Grubb dreams of escape - until a whirlwind encounter with a smuggler plunges him into Fayt's criminal underworld. There he meets the Demon's Watch and learns of their mission to save the port from a mysterious and deadly threat.

Can Grubb and his new allies uncover the dark plot in time, or will they end up as fish food in Harry's Shark Pit?