Desperate to escape the life into which she had been born, Filia, Lucifer's daughter and heir, jumps at the chance to redeem and cleanse herself of her sins. To do this, she must perform selfless good deeds, and she does so under the watchful protection of four angels and a fallen angel on his own road to redemption.

Love blossoms unexpectedly even as Filia is hunted like an animal by demons determined to return her to her father's side. Will the unconventional love Filia shares with her angelic guardians be enough to keep the infernal darkness at bay, or will they be torn asunder?