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.”