Fireheart, the warrior cat, faces many challenges in his new role of ThunderClan deputy as his apprentice, Cloudpaw, resists following the warrior code, Bluestar weakens, and Tigerclaw continues to haunt the forest seeking revenge.

Firestar's grandchildren--Lionpaw, Hollypaw, and Jaypaw--progress in their training to become warrior cats and are drawn for different reasons to the mountains and the Tribe of Rushing Water.

After the warrior cat Clans settle into their new homes, the harmony they once had disappears as the clans start fighting each other, until the day their common enemy--the badger--invades their territory.

When Firestar's grandchildren, Hollyleaf, Lionblaze, and Jayfeather, finally discover who their true parents are, there are dire consequences for ThunderClan and the Warrior Code.

After discovering that the destiny of the Clans is in their paws, Firestar's three grandchildren face turmoil as ThunderClan is attacked, war breaks out between the Clans, and a mysterious stranger warns of more trouble ahead.

The questing cats return to a forest devastated by the Twolegs, where they must find a way to convince their Clans to leave in search of a new home, even though they have no idea where they are going.

In a troubled time for the Clans, three young cats, grandchildren of the legendary Firestar, begin their training as warriors and, in the course of many adventures, discover their true destiny.

"The Clans have finally arrived in their new home, and now they must establish territories and uncover the hidden dangers of this unfamiliar world. But the threats they faced in the forest may not be as perilous as the threats they face from within" -- Page [4] of cover.

When Rusty, an ordinary housecat, becomes ThunderClan's new apprentice, he realizes that his past life has not prepared him for the hardships he now faces and so must work extra hard to prove he can be a true warrior.

Reveals the secrets, histories, and traditions of the five cat clans, and introduces the warrior code that dictates how cats can live side by side in war and peace.