In "D-Day" Kim Sang Ho took out the courage after being determined that it'd be possible that he'd die.
Meanwhile, "D-Day" is about a natural disaster strikes the city of Seoul. The whole city becomes paralyzed in the aftermath as doctors and emergency personnel struggle to save the people.
On the episode of JTBC Friday/Saturday drama "D-Day" (script Hwang Eun Kyung, director Jang Yong Woo) broadcast on November 13th, Il Sup (played by Kim Sang Ho) decided that he would be prepared for death and still go to Yeoido Joint water project.
Before this, Il Sup saw that Ja Hyuk (played by Cha In Pyo) had suggested a water project because it wasn't possible to push the team members into a corner. With that, he asked for just one more day of time. Nonetheless, for Ja Hyuk, the water project was mandatory to save the mega construction. To get back Il Sup again, he went to see him.
Ja Hyuk said, "Destruction is yet another opportunity for construction. For the next thousand years of Korea's future, you need to make a decision. I have no time. With that, he triggered the determination of Ja Hyuk. In the end, Il Sup held his hand. Such decision was opposed by members and they said that they would go ahead of others.