In 1997, a mysterious ghost saved humankind and then disappeared. The mysterious ghost appears again 24 years later and helps a serial killer escape. Kim Sae-ha, Jung Sae-byeok and Song Eo-jin pursue the ghost for different reasons.
Starring Seo Kang-joon, Kim A-joong, Lee Si-young, Kim Moo-yul, Jang So-yeon, Kim Sung-kyun, Heo Joon-seok, Lee Gyu-hoe, Song Sang-eun, Kim Hyeong-mook