KBS Drama Special S2015E13 - Secret

A male in his 50s is found dead in a redevelopment area. Based on the way how cruelly he was murdered, police strongly suspect that it must be a hatred crime committed by one of the victim's acquaintances. They arrest the victim's young Vietnamese wife Thien as a suspect. As she is young and not fluent in Korean, police assume she should confess easily. However, the suspect speaks in fluent Korean that she will exercise the right of silence.