When mysterious alien spheres start invading the world, high school students are called upon to join the world's first war against extraterrestrial forces.
as Kim Chi-yeol
as Im Woo-taek
as Lee Chun-ho
as Park Eun-young
as Guk Young-su
as Doh Su-chul
as Kwon Il-ha
as Jang Young-hoon
as Kim Duk-joong
as Kim You-jung
as Kim In-hye
as Roh Ae-sul
as Yeon Bo-ra
as Wang Tae-man
as Lee Na-ra
as Lee Soon Yi
as Jo Young-shin
as Jo Jang-su
as Cha So-yeon
as Woo Hee-rak
as Choi Yeon-ju
as Kim Won-bin
as Yoo Ha-Na
as Hong Jun Hee
as Park So Yoon
as Science High School student
