Although it is a good drama with enough tension and suspense, the development of the revenge plot was weak and the series' dramatic tone and mood was too somber with little changes on the main characters’ demeanor. Jung Yoo Mi as Chae Yeo Kyung and Chun Jung Myung as Moo Myung did not performed to the standard of main lead characters and their chemistry was way off. I must say that Park Tae Ha (Lee Sang Yeob) and Kim Da Hae (Gong Seung Yeon) really saved this drama. Also, Jo Hee Bong as Doggoo was great!SPOILER ALERT: Also, the poignant and unnecessary death of Kim Dae Hae ruined the drama for me!