Darkus Cuttle has taken care of his father ever since his mother died, but one day his father vanished from a locked vault at the Natural History Museum, and now he lives with his eccentric uncle--but one day he finds a large and unusually intelligent andself-aware beetle, and soon he and his two friends are caught up in a struggle to protect an intelligent super species of beetles.

Cruel beetle fashionista Lucretia Cutter is still at large with her yellow ladybird spies. And now that she's brainwashed Darkus's father to stay by her side -he, Virginia, and Bertolt are determined to stop her... once and for all. The final installment in the Beetle trilogy flies readers to Lucretia's secret Biome hidden in the Amazon rain forest. If they can't stop Lucretia, she will release her hoard of giant Frankenstein beetles, and the planet...