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.

Starring:

Im Se Mi, Shin Hyun Soo, Ji Min Hyuk, Kim So Hee, Kim Min Chul, Moon Sang Min, Lee Yun, Lee Soon Won, Shin Myung Sung, Kim Ki Hae, Kwon Eun Bin, 13 more, Kim Soo Gyum, Kim Jung Ran, Shin Soo Hyun, Shin Hye Ji, Ahn Da Eun, Ahn Do Gyu, Yeo Joo Ha, Oh Se Eun, Woo Min Kyu, Yoon Jong Bin, Hong Sa Bin, Hwang Se In, Choi Moon Hee

Genre:

Drama, Thriller, Sci-Fi