Firestar, leader of the Thunder Clan, sets off on a harrowing journey to find a long-lost clan of cats that had been forced to leave the forest many moons ago.

"The Bamboo Kingdom is once again safely led by guidance of a real Dragon Speaker--three Dragon Speakers, in fact! But a troubling vision from the Great Dragon warns of a "Dark Sun" coming soon. And while Rain, Leaf, and Ghost argue amongst themselves about what it means, the monkeys are hatching a plan to use this moment of uncertainty to their best advantage... Unless the pandas learn to trust each other, their biggest challenges may still lurk...