Gang In Ho is the newly appointed art teacher at Gwangju Inhwa School, a school for deaf children. He is excited to teach his new students, yet the children are aloof and distant, trying to avoid running into him as much as possible. When the children finally open up, In Ho faces the shocking and ugly truth about the school and what the students have been enduring in secret. (Source: MyDramaList) ~~ Adapted from the novel "The Crucible" by Gong Ji Young, which is based on true events that took place in the early 2000s.