Seraphina, Heaven's chief hunter, is sent to the mortal world on a mission: to bring back the "Child of God," Eve, whom the Demon King Lucifer has abducted. But a four-year-old girl recognizes her on the street as "Mommy," forcing her to move in with Lucifer, who is living under the alias "Luke." Three assassination attempts are all interrupted by family moments, and she eventually signs a marriage contract.
When the truth comes out, Luke is Lucifer, and Eve is Heaven's weapon, the "Child of God." Heaven's army bears down on them; Lucifer is captured, and Seraphina—along with her daughter and all of Limbo—storms back into Heaven. In the end, Eve declares aloud: "I am not the Child of God. I am Mommy and Daddy's child." The family of three holds a belated wedding at a mortal-world kindergarten.
