Greed is only the beginning. There will be war.

Since fleeing from Clear Sky's camp in the forest, Thunder has safely returned to settle on the moor with Gray Wing. But the rivalries that have plagued the cats for moons are growing stronger. Gray Wing still believes there is a way for both groups to live in peace, while Clear Sky insists that harsh rules and divided territories are the only hope for the future.

What started as a misunderstanding between two brothers has spread far and wide--and now every mountain cat, rogue, and kittypet who settles in the forest will be forced to pick a side.