In a school for the deaf in South Korea, a newly arrived teacher, Kang In-ho, faces an environment that seems welcoming at first glance, but hides a dark reality. As he tries to adapt and connect with his students, he soon realizes that some of the students have been subjected to systematic abuse by staff members. The situation becomes more complicated when In-ho discovers that the school administration is more concerned about protecting its reputation than about the safety of the young people in their care.
With each new finding, the teacher becomes an unwitting advocate for the students, gathering the courage to confront the corrupt institution. However, the path will not be easy. As he delves deeper into the truth, In-ho faces increasing pressure from the community and the school itself, urging him to remain silent. His constant efforts to seek justice transform him into a symbol of resistance, sparking a movement among students and parents who seek to break the cycle of abuse.
Tension rises as revelations become more shocking and the repercussions are felt throughout the community. Ultimately, In-ho is forced to make difficult decisions that will test not only his integrity but also the thread that binds these victims in their fight for the truth. In this heartbreaking tale, hope and courage shine through despite the shadows surrounding them.