Limit plot
A series of child abductions take place and policewoman So-eun takes part in the case. Police gather at the family home of a newly abducted child. His mother ends the phone call with the kidnapper in shock and collapses. Traumatized by the failure of a past kidnapping case, So-eun is tasked with taking the mother's place. When the kidnapper realizes this, So-eun's son is also kidnapped. As a result, the policewoman is forced to go out alone without her colleagues, so that she can hand over the requested money to the perpetrators.