Duan, who is a nurse, finds out that her own sister has been having an affair with her husband. In order to get her husband for herself, Duan turns her sister into a zombie by injecting a drug on her. However, her husband doesn't mind having sex with her zombie sister, but he gets bitten and also turns into a zombie. Duan now has two zombies to take care of and she also doesn't seem to mind having sex with her sister's zombie boyfriend.
Duan finds out that her sister is having an affair with her husband so she turns her into a zombie using some drug. At 49:19, she lusts on her sister's boyfriend (bespectacled guy) while secretly watching him take a bath. She enters his bedroom later and has sex with him. She also fucks him the second time around with her nurse outfit on, and the third time when he's already a zombie. Duan's husband is already bitten by her sister when she first fucks her sister's boyfriend. The description says he will turn into a zombie later, but it is only in Duan's dream that he rises and becomes one.