Kang Hye-na receives an anonymous message on the day her husband's 'best friend' Park Chae-rin returns to the country. The message includes a video, and in that video is a scene of her husband Kim Seung-hoon and Park Chae-rin having an affair. Not only that, but the two plan to kill Kang Hye-na and take all her fortune. The most horrifying fact is that the very medicine Kang Hye-na takes daily is what will kill her. That medicine was none other than what her husband, Kim Seung-hoon, personally prepared for her. Upon realizing that her husband and his mistress are trying to kill her and steal her fortune, Kang Hye-na decides she will no longer live as a good wife. She vows to take back everything she has given her husband.