When a gateway opens to a parallel universe in modern-day Korea, a king must step into another world in search of answers to a long-unanswered mystery.

A modern-day Korean emperor passes through a mysterious portal and into a parallel world, where he encounters a feisty police detective.

Kang Han-Kyeol is a great yet sullen composer who becomes inspired by the voices of others and keeps his identity secret from people. He meets Yoon So-Rim, a high school student who possesses beautiful singing, whilst under his secret identity, and she falls in love with him. Adaptation of the manga by Kotomi Aoki under the same name, which has been running since 2009.

To pay a debt, a married man (Kwon Sang-Woo) receives billions of won from a woman. In return for the money, the man gives himself to the woman.