The Unicorn says that humans are brought to Narnia only in a time of great need-and that time is now. The Great Lion, Aslan, the heart of Narnia is mising. An imposor roams the land in his place, enslaving Aslan's loyal creatures and spreading treachery and lies. Only King Tirian and his small band of loyal followers are left to fight the last battle in this magnificent ending to The Chronicles of Narnia.