A long-standing feud between two rival magical families in the city of Caprona threatens to destroy the city's protective spells and leave it vulnerable to outside forces. The protagonists, Tonino Montana and Angelica Petrocchi, must navigate the complex social and magical hierarchies of their respective families to uncover the source of the discord. As the city's magic begins to fail, they face opposition from both their own kin and mysterious external entities seeking to exploit the chaos. The narrative utilizes a third-person perspective to shift between the various members of the warring houses, highlighting the absurdity and danger of their entrenched conflict.

The work is widely regarded as a quintessential example of the author's ability to blend whimsical fantasy with sharp social commentary. Readers often highlight the cleverness of the world-building and the distinct, vibrant voices given to the members of the two feuding families. The narrative structure is frequently praised for its pacing, which balances the escalating magical tension with character-driven humor. It remains a staple of the series, noted for its unique setting and the way it expands the scope of the Chrestomanci universe.