Ning helps Wiroj with a secret project. The students are forced to take shelter in the gym to escape the zombies.

Some students notice something peculiar about the zombies. Ning and Prao have a falling out, while Wiroj and Kanchana's research is exposed.

A video of the zombies provides an important clue. Wiroj must find a way to help Kanchana. Ning and Jean search for the source of the infection.

As the students try to deal with the zombies, the relationship between San and Non is coming to light. Ning and Jean make a shocking discovery.

Some of the students decide to take on the zombies. Wiroj asks the Patron for help. Who will make it out alive?