In a harsh and dangerous world, a rat and a boy must each choose their way as their fates become inextricably linked. Efren is a young rat, unnoticed and timid among the kingdom of rats living in the London sewers. When the king dies, leaving the kingdom in upheaval, only Efren dares to journey into the human world, where he discovers a human doctor's plan to destroy London's entire rat population. Meanwhile, Peter, otherwise known as Dogboy, does...