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.

Chang-do earns his living by being beaten. His fiancée gets killed by a drunken driver, Hee-sung. But she gets off scot-free with money. Chang-do’s minions hit her to be in a coma. Chang-do takes Hee-sung to hometown. Hee-sung awakens but loses all her memories. What will be their destiny?