Secret to Her

The Pearl Harbor Attack by Japan in 1941 and the nuclear bomb explosion in 1945 together led to the independence of Chosun (Korea). Behind these historical incidents, there was HAN Gil-soo, the double agent. For Chosun's independence, HAN has stirred the era.

In 1920, a combat flight training school named "Willows" is founded in California. People who want to fight for Korea’s independence from Japan gather at the school. Their mission is to bomb the palace of the Japanese emperor. The pilots’ ardent desire for Korea’s independence grows, but as they prepare for their mission, a spy in the school ruins their plans. However, KIM Ja-jung and the other pilots manage to get on board for what will most likely be their last flight.