Based on the Irish tale "The Fate of the Children of Lir," "SwanSong" is the story of a jealous half-Tslyddi woman who curses her four Wolleni stepchildren to 900 years as swans. But the curse goes awry and the children are only partially transformed. The childrens' journey, as they learn to cope with their changed lives, is one of hardship, tragedy, and triumph.