Lucky has always been a Lone Dog, but when the devastating Big Growl earthquake strikes, his life changes forever. In a dangerous new world without humans, Lucky musst learn to live and hunt with a Pack in order to survive.
The Leashed Dogs have settled in the forest, but a menacing Pack of Wild Dogs threatens to drive them away. Lucky must go behind enemy lines on a mission that will put his loyalties to the test. The lines between the Packs blur and not every dog will survive!