Huang Sicheng graduates only to become unemployed, and is also plagued by a strange illness. His life is bleak and hopeless. By chance, he activates a mysterious game System and meets Xiaomeng, who has been cast out by a vampire clan. To grow stronger, they battle monsters in the dark forest, practice skills in an abandoned castle, and combine skills and craft items. Along the way, they fight off vampires who provoke them and overcome one challenge after another in ruins and caves, while their feelings for each other grow. Just as they gather the materials needed to learn the powerful skill "Blood Contract," danger quietly draws near.
