The police procedural tackles crimes and clues in the cyber world, weaving a massive, twist-filled mystery of murders, identity switches, corruption and conspiracy.

Lee Jang-hwan receives widespread acclaim and media attention after successfully cloning human embryo stem cells. A TV news program PD, Yoon Min-cheol, receives a phone call from an anonymous source who says he has worked with Dr. Lee on the stem cell project. The source blows the whistle on Lee's work, revealing how Lee fabricated research results and engaged in unethical practices.

A group of people meet for the first time in a long time and play a game that reveals each other's secrets.

A woman suddenly disappears. Her fiance then sets out to find her and, in the process, uncovers layers of dark hidden secrets.

Kang Ji-won, a terminally ill cancer patient, is killed by her husband and best friend after she witnesses them having an affair. She wakes up 10 years before the incident and decides to seek revenge with the help of Yu Ji-hyuk, a director at the company where she works. Now, she must reclaim her fate and eliminate the trash from her life.

A former taekwondo champion and an information desk worker aspire to chase their dreams in a world that isn't kind to those with mediocre credentials.