Seasoned actor Jaeha and former idol star Youngwoo are cast in the drama Unchain. Absorbed in their roles, they get drawn to each other. Jaeha’s girlfriend Heewon becomes worried about them. Between drama and reality, desires begin a dangerous tug of war.

Based on the series by the popular Japanese novelist Keigo Higashino, this is a mystery drama that ‘faithfully but freely’ adapts the 3rd part in the series, . The story revolves around 3 characters: a woman who unwittingly killed her husband, a math genius next door who sets up a perfect alibi for her out of his attraction toward her, and a detective who closely traces her, finding the alibi suspicious.

Jeong Yoon is a caring wife and mother and a sensitive woman who finds herself plunged into a legal ordeal thousands of miles from home. After years of planning, she and her husband Jong Bae open an auto body repair shop, only to see everything they’ve worked for stripped away when a loan Jong Bae had guaranteed defaults. Facing financial despondency, the couple gets into a vicious fight about money, sending Jeong Yeon away, leaving only a cryptic note saying she’ll be back in a few days. When she turns up looking nervous at Orly Airport in Paris with over 30 kilograms of cocaine in her luggage, it is the beginning of a globe-spanning nightmare that began with an old friend and a tempting proposition.