: The original criminal case was reopened, and a key administrator was ultimately sentenced to 12 years in prison.

: In October 2011, the National Assembly passed a revised bill (the "Dogani Law") that abolished the statute of limitations for sexual crimes against minors under 13 and persons with disabilities.

: The maximum penalty for such crimes was raised to life imprisonment.

The story follows (played by Gong Yoo), a newly appointed art teacher at Benevolence Academy in the fictional city of Mujin. Upon arrival, In-ho notices the students' aloof and fearful behavior. He eventually uncovers a disturbing reality: staff members, including the school principal, have been brutally abusing the children for years.