A series of mysterious disappearance cases go on, when a stoic girl named Rassarin moves to work at the same place with Nop. Nop learns that Rossarin is not human but a hunting vampire who is looking for her sister Ratirom. Nop unwittingly becomes an assistant for Rossarin. They both are being chased by lieutenant Chanon who believes that Nop and Rossarin are involved with the disappearance cases. Their mission also gets disrupted by Mahasamut, the very first vampire who brought the disease to Thailand who would do everything to stop Rossarin.