In Irish Mythology, Otherworld is a happy land and Underworld is a foul land. These worlds exist alongside Earth. Wizard Drowe is sentenced to be a swan, but he escapes. He has tricked Ciarán, his apprentice, into becoming the swan. Granny and Aoife pursue the swan because Granny believes it will lead her to her lost village. Hunted by Wizard Drowe and the vampire Dearg-due, Ciarán and Aoife move from initial dislike to romance. These, in turn, are pursued by Venus and the Drimnagh Witches, servants of the Faerie Queen. Behind the scenes Druid Lochlain maneuvers to replace the Faerie Queen. The finale takes place in the O'Cinnéide Village, accessed through a capstone on the remote Eagle Mountain.

List of principal characters:

* Faerie Queen - ruler of Otherworld.

*Venus - a magic cat, set the task of solving the mystery of the lost O'Cinnéide village.

*Druid Lochlain - current Chief Minister to the Faerie Queen.

*Wizard Drowe - former Chief Minister, sentenced to be a swan for sedition.

*Ciarán - trainee wizard, tricked into becoming a swan by Wizard Drowe.

*Aoife - Eighteen year old maiden who must kiss the swan to break the spell.

*Granny to Aoife - witch member of the O'Cinnéide coven. Seeking her lost village.

*The Drimnagh Witches - powerful coven faithful to the Faerie Queen.

*Dearg-due - Legendary Irish vampire, associate of Wizard Drowe