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 fashion student with big dreams falls for a carefree delivery worker, but as feelings grow, ambition and uncertainty threaten their fragile romance.

No.1 subscribed live streamer, Woo Sang, specializes in criminal profiling and covering crime-related mystery cases. One day, Woo Sang streams about an unsolved serial murder case and ends up unveiling the truth to some dark secrets through his channel.

Seongjong who history remembers, earns a reputation for appreciating the motto 'making the people feel comfortable and putting political affairs right'. He is known as the king who led his country in the most peaceful and steady way during the Joseon times. However, was Seongjong really a wise king? Seongjong was enthroned by Queen Jeong-hee, Queen In-soo, Han Myeong-hoi and his supporters. The 13-year-old king made 73 of his supporters his retainers! Numerous noblemen were happy that he became king. However, some of his people had to cry blood because he became the king. "Is this country run by phantoms like you My Lord?" Seongjong, the puppet who dreamt of a reign of peace, wishes to behead the king who dominates the people!

Gang leaders Gyeong-cheol and Tae-yong hide after an attack, while psychopath In-seong wreaks havoc. Detective Cha Do-pil, seeking revenge, convinces them to join forces. A pastor, a monk, and a detective unite for a chaotic showdown.

Ki Jin, an aspiring fashion design student with big dreams, struggles to find his path in South Korea's competitive fashion industry.