As an asteroid hurtles towards Earth with nothing to stop it, one determined teacher fights to keep her former students safe — no matter the cost.

Ahn Eun-jin, Yoo Ah-in, Jeon Seong-woo, Kim Yoon-hye, Seo Ye-hwa, Yoon Seo-ah, Hong Woo-jin, Kang Seok-woo, Kim Kang-hoon, Kim Yeong-ok, Kim Young-woong, Park Joo-hee, Baek Suk-kwang, Baek Hyun-jin, Shin Dam-su, Lee Seo-hwan, Im Gi-hong