Matilda and Albert have ended up in the marshlands after Matilda’s parents disappeared to that place through a portal in the cellar. On behalf of Mrs. Lynbrook, they are supposed to collect her exhusband’s debts in this bleak landscape, but for that they have to beat the ominous monster Tzunath which is stalking the marshlands. But Matilda gets also caught – and Albert urgently needs the help of Cynthia, the debt collector, to free her from the monster’s clutches ...