A student from an elite high school fell to his death on Christmas Day. Just as the police and the school were ready to wrap it up as a suicide, a student claimed to have witnessed the murder. That witness got into a car accident soon after. The students became restless and uneasy. Hounded by the media and frustrated with the surrounding adults who ignored their pleas and questions, they decided to hold their own school trial, where each student had their own role to play.
A student at a well-known high school, she is intelligent and determined. Although as a class president, she tries to help struggling students from time to time, she's ordinarily just a simple girl who wants to pass high school smoothly and then enter a good college. A murder incident at the school will thrust her onto a pedestal and change her life. She acts as a prosecutor in the school trial.
An adopted son of a former prosecutor, he is a student from another school who has a dark secret that could be the key to solving the case. A cellist and Lee So-woo's best friend, he assumes the identity of The Watchman of Jung Guk High School. He acts as a defense attorney in the school trial.
The first one who found Lee So-woo's body. Growing up in a dysfunctional family, he is being suspected by his own mother and had suicidal thoughts for a while. Has a crush on Go Seo-yeon. He acts as an assistant attorney in the school trial.
The dead student. He tried not to stand-out, but had keen observation skills and a cynical view of the world. He was the original owner of a secret SNS account, The Watchman of Jung Guk High School.
He is the legal counsel of the school's foundation and a former prosecutor. He adopted Ji-hoon and supported him, to the point that he is even ready to conceal anything that can ruin his adopted son's life.[2]
In this table, the blue numbers represent the lowest ratings and the red numbers represent the highest ratings.
Ep.
Original broadcast date
Average audience share
AGB Nielsen
TNmS
Nationwide
Nationwide
1
December 16, 2016
1.422%
1.5%
2
December 17, 2016
1.106%
0.6%
3
December 23, 2016
1.731%
1.3%
4
December 24, 2016
0.970%
1.0%
5
January 6, 2017
1.614%
1.1%
6
January 7, 2017
0.836%
0.6%
7
January 13, 2017
1.204%
1.2%
8
January 14, 2017
1.268%
1.1%
9
January 20, 2017
1.537%
1.3%
10
January 21, 2017
0.730%
0.7%
11
January 27, 2017
1.142%
1.3%
12
January 28, 2017
0.722%
0.8%
Average
1.190%
1.0%
This drama aired on a cable channel/pay TV which normally has a relatively smaller audience compared to free-to-air TV/public broadcasters (KBS, SBS, MBC and EBS).
Episode 5-6 were delayed a week due to the special New Year broadcast of JTBC's variety shows Phantom Singer and Package Tour on December 30–31, 2016.
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