Deuk Cheon, a homicide detective, is on the verge of catching Sung Joon whom he thinks is the kidnapper of his daughter. Deuk Cheon does his best to find the culprit, but ends up meeting two culprits who look exactly the same.
When Prosecutor Choi Jo Hye takes over Soo Yeon's case, Deuk Cheon has very little time to get a confession out of the man the police were able to find who claims not to remember anything.
Deuk Cheon and Sung Joon escape from the police and make their way to Busan. Sung Joon tries to find the homeless guy who gave him the ticket to Seoul. Meanwhile, Prosecutor Choi decides to conduct the investigation in secret.
Prosecutor Choi decides on a risky method to collect evidence against San Young Pharmaceutical Company. Sung Joon and Sung Hoon find out more about Dr. Han.
