After three years of imprisonment, Serena Rivers emerges as the feared Dark Prison's Female Shura, trained by notorious masters in healing, poison, and martial arts. She finally captures Xavier Stone, the powerful warden of the 9,800th Prison, to use his Frost Poison to suppress her Vermilion bloodline. However, this suppression lasts only three months, forcing her to find a Dragon Vessel partner to avoid fatal consequences. Meanwhile, Xavier announces his term is over and returns to lead the Stone family, planning to marry Serena. Their rivalry escalates as both acknowledge each other as prey, signaling that their conflict has only begun.