Darkus and his friends continue their unforgettable adventure in this final instalment of the Beetle trilogy. Arch-villainess Lucretia Cutter has a secret Biome hidden in the Amazon rainforest: can Darkus and his friends, human and beetle alike, find it before it's too late? If they can't stop Lucretia, she will release her hoard of giant Frankenstein beetles and the planet will never be the same again…