12 year old Imogen ran away to a fancy boarding school after the matriarch of the Crims was killed in a heist. However, when the rest of the family is jailed for the theft of a valuable lunch box, she feels obliged to return to help them out.
Davies does a competent job of delineating the numerous Crims by providing them with a defining trait: fearsome-looking Uncle Knuckles is really a gentle flower-loving man, Freddie is astonishingly absent-minded, Imogen’s father is an accountant who loves numbers and book-keeping, and so on. Imogen had developed an ambition to be a future world leader while at school, but now discovers that her love for her family and her suppressed criminal plotting genius outweighs that.
The silly situations, word play, and broad characters are somewhat reminiscent of Lemony Snicket, though the quips about grisly murders fall rather flat.
Judging by the open ending, the intention is to have a sequel in which the Crims take on the frighteningly competent Kruk family.