After badgers attack, Strormfur and Brook- former cats of the Tribe of Rushing Water and RiverCan- help rebuild the ThunderClan camp. Midnight is a badger who speaks cat and helped the cats find there new home.
Tigerstar visits in his sons' -Hawkfrost and Brambleclaw- dreams and tries to get them to take over two Clans each and unite them so they rule all the cats like Tigerstar tried to do. Brambleclaw doesn't know what his half brother and father are plotting and they tell him they're helping him gain his Clanmates' respect and become their deputy.
Firestar finally admits that Graystripe -his best friend and deputy- is gone. He appoints Brambleclaw as the new deputy of ThunderClan.
In the end, Firestar gets caught in a trap twolegs set for foxes. Hawkfrost tries to persuade Brambleclaw to kill Firestar (6 times) so he can be leader of ThunderClan.
When Brambleclaw refuses, Hawkfrost threatens to kill Firestar himself. Brambleclaw and Hawkfrost fight, and Brambleclaw accidentally kills his half brother to save Firestar.
Brambleclaw frees Firestar from the trap and more cats come to help. (Squirrelflight and Leafpool - Firestar's daughters: Leafpool - medicine cat; Sqirrelflight - warrior/Brambleclaw's mate )