When mysterious alien spheres start invading the world, high school students are called upon to join the world's first war against extraterrestrial forces.
Starring Kim Ki-hae, Shin Myung-sung, Shin Hyun-soo, Im Se-mi, Ahn Do-gyu, Kim Min-chul, Kim Su-gyeom, Ro Jong-hyun, Woo Min-kyu, Yeo Joo-ha