Taeyang Group is the largest Conglomerate in South Korea. The Choi family who runs Taeyang has supposedly been under a curse for a hundred years that the first bride of the eldest son will always die. When the wealthy heiress Jang Yi-kyung disappears right before her wedding to heir Choi Kang-joo , Na Doo-rim , a lookalike impostor, is brought in to take her place. Unlike the cold and calculating Yi-kyung, Doo-rim is sweet and sunny, and Kang-joo genuinely falls in love with her. As the wedding plans progress, Kang-joo and Yi-kyung's mothers both scheme and plot behind the scenes.

After moving to the country to cope with illness, a city girl befriends a mute boy who appears to have literally been raised by wolves.

On the day the 15-year statute of limitations expired on a high profile serial murder case that claimed the lives of 10 women, a family member of the victim throws himself off the building in front of Choi Hyeong-goo, the detective in charge of the case. Two years later, a man called Lee Doo-seok publishes a book titled "I am the Murderer" claiming responsibility for the murders that took place 17 years ago. His book becomes a bestseller because of the author’s charming looks and his vivid depiction of the crime. The detective and the self-proclaimed murderer meet face to face on a television debate show. Believing that Lee is nothing but a con artist, Detective Choi renews his search for the ultimate truth. Then another man appears suddenly, claiming he is the real killer.