"Until we became famous, promise that we'll wait for each other?"  "I promise."  A promise between two trainees that were forbid of their love because of future debut. Will they be able to keep that promise?  What if things don't turn out as they want it to?

In the beginning, two sides of Korea were at war for survival, for power. Twenty-seven brave and loyal men had volunteered to take on the nation's duty and cross over to North Korean territory to undergo a secret mission that would benefit South korea greatly. "I will protect all twenty seven of you so that you make it back safely. A man's promise to all of you." said the president to the men. Five officials from South korea (which included the president)