A string of murders brings with a psychic librarian a detective, and also a prosecutor with questionable reasons in this action thriller starring Joo Ji Hoon Uhm Tae Woong, and Shin Min Ah. Detective Kang Oh Soo is delegated to two apparently unrelated murder cases, where the only clues left behind are cards. He is lead to Seo Hae Ina quiet librarian who has got the ability to generate a psychic connection. She shows to him that the victims were attached to the death of a senior school. The one common link between the suspects is that their defense attorney, Oh Seung Ha. Figure out everything is connected than you think in this suspenseful thriller. The show would be the next episode of the revenge trilogy after Resurrection in 2005 by director Park Chan-hong and writer Kim Ji-woo and followed by Shark in 2013.