Beatrice Voltolini is the daughter of a wealthy family who inadvertently made a contract with Sieg, the Swan Imagin, to make sure that her baby would be born safely. However, shortly after she gave birth to a son, Peter, he is kidnapped by Albert Moffett, & Sieg emerges &, with no clear memory, believes he had opened the contract with the baby instead of the mother. Sieg sees Beatrice as his mother & Peter as his brother.