Atwater Woods is home to hundreds of different anthropomorphic animal clans who have an abundance of technology available to them. Sparked by a group of common rats being abducted, a chain of events leads to a war between the clans in Atwater Woods and its three surrounding forests. A silver-haired rat named Alfie, who has a disposition for recklessness, falls prey to the blooming war, but becomes involved when his clan is repeatedly targeted by larger beasts. His pregnant wife Cheshire, a more responsible and logical version of her husband, wants Alfie to survive to see their babe born though would rather help him fight than remain on the sidelines as a bystander. The destitute cat clan is desperate for food whereupon the loyal Russian Blue cat Amos is relied on to provide for his faction; Amos hoping to end their hunger by offering up Alfie's clan. A violent king snake called King wants nothing more than to kill others to show his prowess in murder, but finds himself a prisoner of the infamous bat clan of High Peak Mountain. This bat clan hopes to spread their dominance over Atwater Woods while systematically enslaving other creatures including the crow Korvus and a bat known as Batskins. Meanwhile, there is a creature who can shape-shift into anything that it kills and therefore blend in though no one seems to know who or what it is.