South Korea, 1993. An agent of the National Intelligence Service is sent to Beijing to infiltrate a group of North Korean officials with the ultimate goal of obtaining information about their nuclear program.
Woo-jin, a furniture designer who wakes up in a different body every day, falls for Yi-soo, a woman he meets through his work.
Ja-yoon is a high school student who struggles with memory loss after she endured some unknown trauma during her childhood. While trying to uncover the truth, she is unwittingly dragged into a world of crime and finds herself on a journey that will awaken many secrets hidden deep within.