In the 1936 Berlin Olympics, marathon gold medalist 'Son Ki-jeong' set a world record. On the award podium, where the national anthem played, he covered his chest with a flowerpot to hide the Rising Sun flag. Overnight, he became a national hero, but he could no longer run due to Japanese oppression. After liberation in 1947 in Seoul, 'Son Ki-jeong' appears before 'Seo Yun-bok,' who is expected to become the next Son Ki-jeong, and proposes endless participation in the 'Boston Marathon.' It's all to regain the glory of the Berlin Olympics, which was under Japanese control, and to run with the Korean flag on their chests for the first time!