In the medieval era, the Holy Church launches a brutal suppression against vampire clans. To resist the siege and expand power, two top vampire families arrange a political marriage. However, on the verge of the wedding, the male lead betrays the female lead and decides to marry the heir of a weak minor clan. Calm and sober, the female lead accepts the betrayal indifferently. Secretly, she withdraws all her family’s support and allows the Church to besiege the male lead’s clan. Lacking assistance and dragged down by his greedy new wife, the male lead’s family falls into a fatal crisis. His wife abandons him in desperation but still loses her entire clan to the Church. When the Church prepares the final extermination strike, the female lead steps forward with harsh terms: the male lead’s clan must become her subordinate vassal. After the crisis, she annexes all his forces. The male lead and his father are expelled and reduced to commoners. Years later, the remorseful male lead reunites with her, only to be rejected coldly. The female lead bids him a peaceful and final farewell.
