D-Day

The competition between hotel executives over mergers and acquisitions and their intertwined love lives begin.

After graduating from high school Min-seo fails to get into college. He spends the next year cramming for his entrance exam once again. Jeong-hun a university student fresh out of high school school.

Sang-hyeon (Cha In-Pyo) is a third-rate comedian who works in a shady nightclub. One day, a man comes into the club with his son and a briefcase. The man looks for the owner but he's not around. Later that evening Sang-hyeon witnesses a car accident involving the man that came into the nightclub. The man is dying and he asks Sang-hyeon to take his son and briefcase to his wife. Sang-hyeon goes to the deceased man's family with the son and briefcase. The family asks Sang-hyeon to take the son Jae-yeong to his mother in Donghae, South Korea. Sang-hyeon is a gambling addict and because of this is in heavy debt. The family offers to pay Sang-hyeon a large amount of money if he would take the son. Sang-hyeon already dreams of stopping at a casino in nearby Jeongseon after delivering the boy.

Han Jung-Rok is a former national archer and current deliveryman from 2019. He ends up traveling to the past with his first love, Lee Hye-Jin and meets Im Kkeok-Jeong, a famous thief from the Joseon dynasty. Together, they struggle to survive, put their lives at stake for the people they love, and share a strong friendship.