One unexpected choice can change everything about your life. Cha Joo Hyuk works at a bank and has been married to Seo Woo Jin for five years. When a strange incident happens one day, Joo Hyuk makes a decision that impacts his life and those around him in unexpected ways. Suddenly, the life he had with Woo Jin and his best friend, Yoon Joong Hoo, are gone and he is leading a very different life. How will his first love, Lee Hee Won, factor into his new life? And will it be possible to get his old life back?

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.

Lee Jae-Sang (Rain) is a lawyer at JK Law Firm, which is one of the biggest law firms in South Korea. He is an excellent lawyer, but he only cares about winning for his benefit. One day, he has a mysterious car accident and he is drawn into a parallel world. There, Lee Jae-Sang finds himself working as a prosecutor. He is strict in carrying out the law. He is married to Ra Shi-On (Lim Ji-Yeon), who loves Lee Jae-Sang and is faithful to him. In the world where Lee Jae-Sang came from, he broke up with Ra Shi-On ten years earlier and Ra Shi-On works as a detective. Lee Jae-Sang struggles to cope with his different selves.

Han Hyo-joo plays a surgeon whose father is a famous comic book creator. One day Dad goes missing and she rushes to his workshop to look for him, and instead finds a strange man bathed in blood. She gets kidnapped by the bloody man, which is where their story begins. The drama takes place in 2016 Seoul, but in different dimensions that exist in parallel with one another. It’s described as a suspense romance melodrama about “a man and a woman who are living in the same time, but different worlds.”

Kim Moon Ho is a successful reporter at a mainstream news station, but when he stumbles upon a 10-year-old mystery, he's forced to dive into a subversive underground news agency. On his journey to break open the case, Moon Ho teams up with Chae Young Shin, a second rate tabloid writer, and Healer, a mysterious internet-based journalist. With his career and his safety on the line, who can Moon Ho trust in a world full of unreliable sources?

Hae-gap is a director who makes anti-government documentary films. One day, Hae-gap’s son, Na-ra, runs away from home, but Man-deok, a freeloader living in Hae-gap’s house ends up bringing him back. Later, Man-deok raids the head developer of Deul Island to stop its exploitation, and Na-ra helps and ends up getting caught. In order to bring Na-ra out from jail, Hae-gap signs to stop making anti-government films and moves to Deul Island with his family. Na-ra sees his father leading a good, quiet life there and starts opening up. But when a construction company charges in to clear-out the island and the islanders fall at risk of losing their homes, Hae-gap leads a strike against it and his family fall in grave danger...