Jang Hyun is living without purpose or desire. He's a cold-hearted man who loves no one until he gets introduced to love after meeting Gil Chae. She is charming and admired by all, but her first love, Yeon Jun, is already engaged to her best friend, Eun Ae. Yeon Jun, a Sungkyunkwan student, struggles with his feelings for Gil Chae but cannot break off his engagement due to tradition. Eun Ae does not doubt nor hate the two. As Jang Hyun becomes entangled in this unusual love triangle, Gil Chae, who has only loved Yeon Jun, is confused about her own feelings. The relationship between these four gets put into an even bigger twist at the breakout of war. Will they survive the challenges of war and find their love amidst the chaos?