Male celebs play make-believe as high schoolers, welcoming star transfer students every week and engaging in battles of witty humor and slapstick.
Han Woo-Jung (Seo Hae-Won) has a bright personality. She is betrayed by her best friend Shin Hwa-Kyung (Oh Seung-A). Because of the betrayal, Han Woo-Jung's life is ruined. Han Woo-Jung keeps pursuing her dream and never loses hope.
When unidentified parasites violently take over human hosts and gain power, humanity must rise to combat the growing threat.