When a spell to rid Regis Towne of rats goes awry, Marquell and Grandfather Rat are transformed into men. Marquell wants no part in playing servant to the wizard responsible for destroying his family and friends, but the mage promises to return him to his true form if he serves for a fortnight. Meanwhile Marquell must navigate the world of his lifelong enemies and survive the selfish demands of the wizard's vain fiancée. Many injustices are heaped upon the household's solitary maid, Constanze, but she soon finds Marquell will defend her honor and share her burdens, while their friendship becomes far more. But can it last? Constanze doesn't know her valiant swain is actually a rat. Will telling her change everything? Or will Marquell sacrifice his identity and remain a man for the sake of love?