To cats from Thunderclan, Brackenfur and Cloudpaw get lost on a journey and fall into a deep abyss and forget who they are, and end up in a lost and forgotten clan. There are six clans Lightningclan, Sorrowclan, Deathclan, Wingclan, Earthclan, and Iceclan. They find out what these mysterious clans are and their leaders. What they don't know, though is why they are forgotten clans and banned from the forest. Brackenfur and Cloudpaw are in serious danger. Warrior Cats, belongs to Erin Hunter. Some of the cats are hers, but a lot of them are mine.