After his parents went missing from a visit to the hospital, Audy (Korakrit Laotrakul) and a group of friends decide to break into the now-quarantined area to find out what happened. They soon discover the horrific truth hidden behind those walls… The hospital is overrun with zombies! Trapped with these brutal beings, Audy rings his brother Lambo (Bhuvadol Vejvongsa) for help, but the conversation gets cut midway.
Lambo, accompanied by their dim-witted brother Cooper (Kittipat Samantrakulchai) and friends Auto (Worachai Sirikongsuwan), Krasoon (Supakrit Thinjun) and Bas (Pasakorn Sanrattana), ventures into the hospital to save Audy. Only there did Lambo and gang realise the terrible fate that awaits them, as they encounter hordes of zombies, hungering for their flesh and blood. Fortunately, they are saved by a mysterious woman (Jutalak Chaweewannamas).
They learn that a deadly virus outbreak in the hospital years ago turned everyone inside into zombies. The boys must now fight their way out in order to stay alive. Will they survive this impending zombie apocalypse?
Video credits to Encore Films YouTube channel