Listen closely, because skilled voice profiler Kang Kwon Joo is back. Working tirelessly at the Emergency Call Center, she uses her first-rate hearing to save lives and catch culprits. When it comes to responding to emergencies within the vital “golden time,” Kang Kwon Joo is simply the best.Do Kang Woo is a mysterious man who’s able to tap into the mind of a criminal. He also hides a secret pain that he doesn’t share with anyone. When he meets Kang Kwon Joo, they reluctantly form a team. She can hear crime; he can think it. Together, they take on the most dangerous criminals their city has ever seen. Watch drama online for free.