Echo, the daughter of a wealthy family, suddenly discovered that she was adopted by her parents to give her sister a blood transfusion. Due to the financial crisis of the family group, she was forced by her materialistic parents to marry Nikola, the founder of the Fantus Group. However, no one knew that Nikola was a vampire who had lived for hundreds of years but had the strong body of a young man. At Nikola's suggestion, they embarked on a contractual marriage with a master servant relationship. Unexpectedly, Echo's innocent kindness touched Nikola's frozen heart for a thousand years, and the two pretended to be genuine and their love grew uncontrollably. The good times don't last long. Vampire hunter Van Helsing kidnapped Echo in order to pursue Nikola, triggering a fierce conflict. Echo and Nikola's love made them vow to protect each other to the death, but Van Helsing allied with the vampire who hated Echo and was also the creator of Nikola, Hailey, to break up the mandarin ducks. Can they escape unscathed from this human vampire battle? Can the power of true love ultimately repel the threat of dark forces?
