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A recently released sexual predator is accused of a kidnapping. As Kang Woo heads to the scene, he runs into the man he believes is haunting him.
Convinced that her suspect did not act alone, Kwon Joo considers her next move, and how best to rein in the unpredictable detective Kang Woo.
While in custody, a suspect dies of an apparent heart attack. Later, Kang Woo receives a message from the real and elusive mastermind.
Kang Kwon Joo, now a National Director of 112 Call Center Division, brings her main team from HQ to Poongsan city to investigate the death of their Dispatch team's leader there. She meets and then appointed Do Kang Woo, a lone and hot-headed detective with mysterious past, as their new team leader.