S01E01 Question the Spheres
For a year, people learn to live with the spheres without suffering any specific changes. Even with the alien-looking spheres floating all over the sky, the CSAT is what matters the most to seniors of...
Duty After School
S01E02: Military Training Begins
After spheres from the sky drop to the ground, military training begins for the students to ensure their safety. However, the students find it too demanding and have a difficult time. As students head to the shooting range to learn how to shoot, they get caught off guard and fall into a crisis. Meanwhile, a student gets killed by one of the spheres.
Overview
When mysterious alien spheres start invading the world, high school students are called upon to join the world’s first war against extraterrestrial forces.
Episodes
S01E02 Military Training Begins
After spheres from the sky drop to the ground, military training begins for the students to ensure their safety. However, the students find it too demanding and have a difficult time. As students head to...
S01E03 School Escape
Two people from Class Two die. To prevent chaos, this news is not yet known throughout the entire school. After their deaths, students of Class Two get sick of all the hardcore training and try...
S01E04 Become the Villain
The first vehicle gets attacked by a sphere and turned over. The soldier dies on the spot, and So-yeon gets badly injured. The students decide to leave the vehicle and find a shelter nearby. Soon,...
S01E05 Will We Ever Go Home?
Chun-ho tries to make sure that the kids all survive so they can return safely to the camp. The kids after having gone through a common struggle begin to bond with each other. They also...
S01E06 Fight Or Flight
After a heated encounter with the spheres, the group picked up some survivors. However, the heavily traumatized survivors have a hard time blending in and coping with the situation. Their outbursts and dire situation make...
S01E07 Disagreement Among Classmates
Children in Class 3-2 who have become accustomed to both the sphere and death. I find laughter again, but I didn't know that a crack was forming in it. Along the way, he meets strangers...
S01E08 Prisoners at Yongwon Penitentiary
Platoon Two encounter prisoners at the Yongwon Penitentiary. Since there are no prison guards, they have been locked up without any food supplies for a while now, and they threaten the kids to open the...
S01E09 For Whom the Bell Tolls
While trying to save Bo-ra, Soo-chul sacrifices himself. Everyone wonders what they should do with his body when suddenly someone mentions that Soo-chul rigged voting. After finding out the truth behind the voting, they break...
S01E10 End of the War
After aborting the mission, the kids walk for days but get to nowhere. However, they reach an amusement park and have fun as if it is their last. Meanwhile, Yeong-soo is not comfortable about walking...
Cast
Shin Hyun-soo
Lee Chun-ho
Kim Ki-hae
Kim Chi-yeol
Lim Se-mi
Park Eun-young
Ahn Do-gyu
Guk Young-su
Kim Su-gyeom
Kwon Il-ha
Woo Min-kyu
Kim Duk-joong
Yeo Joo-ha
Kim You-jung
Ahn Da-eun
Kim In-hye
Lee Yeon
Roh Ae-sul
Kim Min-cheol
Doh Su-chul
Kwon Eun-bin
Yeon Bo-ra
Moon Sang-min
Wang Tae-man
