When her most loyal friend is take surety by Peregus Malister, the barbarous maestro of the thief club, Marek must ship on a corrupt missionary post to function the thief club with her squad of manque hero. But when the missionary post lead them into the clasp of Szorlok - their sterling enemy - Marek must give her ambition and possibly her own psyche before her friend are kill, to halt Szorlok from obtain the Darkspore.