In a land dominated by the mighty Wen clan, a young man named Wei Wuxian strikes up an unconventional friendship with justice-loving Lan Wangji. When the duo unexpectedly stumbles across evidence implicating the Wen clan’s chief in a plot to bring mayhem to the inhabitants of their land, Wei Wuxian and Lan Wangji decide to intervene. However, the pair’s attempts to foil the Wen clan boss’s wicked plans go wrong. In the confusion that follows, Wei Wuxian disappears – with many fearing the worst for him. Sixteen years later, Wei Wuxian returns out of the blue. He is soon reunited with Lan Wangji, just as a spate of mysterious murders has broken out. The duo joins forces once more to investigate, determined not to fail this time… Can the pair get to the bottom of the intrigue? Will they solve the murder cases? And just who is the dastardly secret figure pulling the strings behind the evildoings now blighting the land?

Hong Seol and Yoo Jung attend the same college, but they couldn't be more different. Hong Seol is a poor, unpopular student with no money, while Yoo Jung is rich, well-liked, extremely smart, and popular. Hong Seol just wants to get through her college career quietly, but finds herself getting caught up in whatever Yoo Jung drags her into. Can Hong Seol break away, or will she continue to be the only person who sees Yoo Jung's true self?

Kim Young Ho is a personal trainer for Hollywood stars. Even though he comes from a wealthy family background, he suffered a devastating injury during his childhood days. Now, he overcomes his problems with patience and stubbornness. Meanwhile, Kang Joo Eun is 33-years-old lawyer. She has struggled to support her family. Now, she is overweight and challenge her-selves for a diet.

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.”