Korea has been taken over by aliens, and three agents from two different timelines spearhead the war against them. An unknown monster strikes them! One day, a single scream in an urgent phone call was heard.
Kim Sang-joong
Park Jung-bong
Kim Kang-woo
Kim Hyo-chan
Joo Won
Seo Seo-woong
Park Choong-seon
President
Kwon Eun-soo
Support Team
Lee You-young
Mae-goo
