The two clans, SunClan and MoonClan have been battling for centuries. After a long time of battling the two clans agree to leave each other alone. But that's not all; they have wings. SunClan has feathered wings while MoonClan have papery wings. Two cats from each clan begin to wreak havoc with the outsiders. Until a brave patrol goes to find . . . The lost clans.