A murdered ghost comes back to take revenge on the devil through the body of a teenage girl. A criminal psychologist enters the fray as the story takes place among high school students prepping for college entrance exams.
S01:E01 - Season 1, Episode 1
Yun Ha-na is not your average teenage girl. She's constantly riddled by nightmares and hallucinations.
S01:E02 - Season 1, Episode 2
When Ha-na ditches school with Shi-woo, Du-na is left to come home alone at night and meets with misfortune.
S01:E03 - Season 1, Episode 3
Ryu receives the cell phone by mail and questions the three perpetrators. Meanwhile, killer Jun-hee goes on trial for the murders he committed.
S01:E04 - Season 1, Episode 4
Ha-na begins to realize that her dreams are not dreams as the second boy of the evil trio is murdered by Du-na.
S01:E05 - Season 1, Episode 5
More and more those who got away through loopholes in the law begin to face Ryu's version of divine justice.
S01:E06 - Season 1, Episode 6
As Ha-na struggles to deny the ghosts that search her out for help, Hye-won agrees to take on Jong-chan as her patient.
S01:E07 - Season 1, Episode 7
Ha-na accepts her mother's death and decides to work with Ryu. Meanwhile, Do-shik's men close in on Ryu and Ha-na.
S01:E08 - Season 1, Episode 8
After exacting final retribution on Do-shik and his collaborators, Ryu decides to erase Ha-na's memories to protect her.
S01:E09 - Season 1, Episode 9
A mysterious vigilante The Judge is going around killing people who have escaped punishment by the law through loopholes.
S01:E10 - Season 1, Episode 10
With the return of Ha-na's memories, Do-shik sets out to take advantage of her. Meanwhile, Ryu and Hye-won try to decide if they should confess everything to Ha-na.