On her sixteenth birthday, Aya Mikage learns she carries the soul of Ceres, a celestial maiden robbed of her feathered robe centuries ago by a Mikage ancestor, and that her own family now wants her dead to keep the secret buried. Forced to flee with the help of the easygoing cook Yuuhi and the guarded, mysterious Touya, Aya has to keep the goddess sharing her body under control while her family closes in. Her twin brother Aki is tangled up in the same ancient story in ways she's only beginning to understand.