A self-made executive navigates the cutthroat world of advertising, stopping at nothing — no matter how calculating — to become the head of her agency.

Dong-hyun is a high school student. One day, he falls from the rooftop and bumps into Pan-soo who is a passerby. Pan-soo is a member of a criminal organization. When the two men wake up in the hospital, they discover that they have switched bodies.

A rousing tale of the Korean athletes who ran the 1947 Boston International Marathon, the first international marathon held since World War II.