Kim Jinseo and Mo Yoonhee are high school classmates and rivals whose different family backgrounds shaped their characters and their paths towards love and success in adulthood. Jinseo develops a warm and cheerful personality as well as superior intellectual ability, while Yoonhee becomes a beautiful woman with fatal charm. Both women love Lee Sanghyun, an extremely kind but indecisive man who used to date Yoonhee but later married Jinseo. When Yoonhee's husband, Sung Eunpil, dies under suspicious circumstances, Jinseo finds herself becoming involved in the investigation. The process is complicated when the young homicide detective Kang Shinwoo becomes romantically interested in Jinseo.
Ha Na and Doo Na were twin sisters who were very close to each other until Doo Na died a terrible death. One day, the usually bright and energetic Ha Na finds herself changing. She has superhuman strength and can do things that nobody can. Ha Na realizes that Doo Na's spirit has inhabited her body. Shin Ryu, a criminal psychoanalyst, uses Ha Na's powers to kill people that cannot be punished by the law.
A string of murders brings together a conflicted detective, a psychic librarian, and a mysterious prosecutor with dubious motives in this action thriller starring Uhm Tae Woong, Joo Ji Hoon, and Shin Min Ah. Detective Kang Oh Soo is assigned to two seemingly unrelated murder cases, where the only clues left behind are tarot cards. He is lead to Seo Hae In, a quiet librarian who has the ability to make a psychic connection to an object to discover its history. She reveals to him that the victims were connected to the death of a high school boy years ago. The one common link between the suspects is their defense attorney, Oh Seung Ha, a young lawyer with questionable motives. Find out how everything is more connected than you think in this suspenseful thriller.
The series is the second installment of the revenge trilogy by director Park Chan-hong and writer Kim Ji-woo, after Resurrection in 2005 and followed by Shark in 2013.