Several deaf and mute students from a special school are lured overseas and forced to smuggle drugs inside their bodies. One of them tragically dies. When the students' parents turn to the school's experienced doctor for help, he resolutely risks his life and sets out to rescue the students. As he works to save them, the doctor discovers that the drugs are ultimately destined for China. Driven by a strong sense of responsibility, he refuses to stop at rescuing his own students. Undeterred by the drug dealers' suspicions, probing questions, and threats, he ventures into their den and works with the police to take down the criminal organization endangering the safety of the nation and its people.