King Lir lived happily with his four children until his first wife died. He remarried a woman named Aoife who grew jealous of the children's love for their father. With the help of a Druid, Aoife turned the children into swans under a spell that could only be broken by the sound of a church bell. The children spent 900 years as swans until an old man heard a church bell and broke the spell, but the children had aged so much that they died.