The heroine marries her sister into the Wolf King family that rules the wasteland. The "sacrifice bride" married by the Wolf King was supposed to be his sister.
The Wolf King wants to kill her and sacrifice her to the vampires in exchange for peace.
But he didn't know that the heroine was a legendary hunter who massacred thirteen vampire elders during the vampire civil war.
On the wedding night, the hunter opened his eyes.
The heroine is a reborn person. She sacrificed everything for the Wolf King in her previous life, and her heart was dug out and sacrificed.
Reborn and returned to the wedding day, she has to kill the Wolf King within 72 hours, otherwise the Wolf King's sacrifice ceremony will be completed on the night of the full moon.
But she didn't expect that the Wolf King in this life would be different from the previous life.
The reason why her sister asked her to marry her was because she knew the truth about the sacrifice.
After the heroine was reborn, the "blood contract" given to her by the wolf king in her previous life remained in her body - an unknown existence that was being bred and could subvert the balance between werewolves and vampires (the double meaning of "ball": contracted energy body/real life).
