When two brothers are forced to fight in the Korean War, the elder decides to take the riskiest missions if it will help shield the younger from battle.

A young woman named Yeon-hee is traveling to Pyongyang with a coach full of elderly people. As she flips through old photographs, she remembers telling her husband Min-woo that she wouldn’t allow him to “cross over” to North Korea given the political situation of the day. But Min-woo left anyway and never returned home, and their marriage was torn apart by the Korean War. Now, sixty years after the division of Korea, she looks forward to reuniting with her beloved Min-woo again.

Jun-shik, who works for Tatsuo’s grandfather’s farm while Korea is colonized by Japan, dreams about participating in the Tokyo Olympics as a marathon runner. Tatsuo also aims to become a marathon runner, so the two become rivals. But the war breaks out and they both are forced to enlist in the army. Tatsuo becomes the head of defense in Jun-shik’s unit and he devises a scheme but fails. Jun-shik and Tatsuo are held captive by the Soviets. They run away but soon are captured by the Germans and forced to separate. In 1944, they meet again on the shores of Normandy.

Sung-Chil works at the Jang-Soo Store which is owned by Jang-Soo. Sung-Chil is stubborn and has a bad temper, but he changes after meeting Geum-Nim. Geun-Nim runs a flower shop and her daughter Min-Jung does not like her meeting Sung-Chil.