Lee Hye Won, the general manager of Judan Arts Foundation, is Do Eun's sister, and Hye Won is engaged to Ji Chang, the perfect guy who loves her unconditionally. Due to their parents' divorce, Hye Won and Do Eun were forced to live separately during childhood. Hye Won followed her dad and was abused by her stepmother. Now that she can finally live happily ever after, her life starts to get miserable. She finds out that Do Eun, whom she has been desperately looking for, is shamelessly next to Yi Chul, Ji Chang's father. Hye Ji takes up the new name of Do Eun and blames Hye Won for the misfortune. Do Eun is having an affair with Yi Chul of JY Group, and her plan of becoming his wife gets interrupted as Hye Won gets in her way as the daughter-in-law of Yi Chul. The two sisters have been living as strangers for 20 years, and now they meet again as the women of two men who are father and son. They have no choice but to fight for their lives cold-bloodedly. Until where will their tragedy go?

Cha Ji Won (Lee Jin Wook), a Navy SEAL officer, seeks revenge for his father's murder after being framed as an outlaw in Thailand. His childhood friend Min Sun Jae (Kim Kang Woo), who harbors resentment towards Ji Won, becomes involved in a plot that leads to Ji Won's father's death. With help from Korean ex-patriots Kaya (Moon Chae Won), Ko Sung Min (Lee Won Jong), and Kim Ji Ryoong (Kim Tae Woo), Ji Won navigates dangerous territory to uncover the truth and clear his name. Complicated by past relationships, including his fiancée Yoon Ma Ri (Yoo In Young) and his sister Cha Ji Soo (Im Se Mi), Ji Won must overcome numerous obstacles to find his father's real killer. This is a 2016 South Korean drama series directed by Han Hee, based on a comic by Hwang Mi Na and inspired by "The Count of Monte Cristo."