When a mysterious illness breaks out at a university and the authorities shut down all communication, the students must find a way to survive.

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

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

San and Dr. Kanchana try to cover up a secret, while a group attempts to send a signal to the outside world – only to discover something unimaginable.

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

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.