Set in the near future, a military coup takes place in North Korea. The leader of North Korea and Eom Chul Woo escape to South Korea. The two countries now face a crisis. Chul Woo and South Korean government official Kwak Chul Woo carry out a secret operation to prevent a Korean war. Adapted from the webtoon "Steel Rain" by Yang Woo Suk (writer) & Je Pi Ga Roo (illustrator).