Jiwon, highly motivated new policewoman, meets Osun, a mysterious lady, and Jiwon gets interested in her. Osun is a social worker and she has strong attachment to abused children and tries to help them, but the wall of harsh reality is too high. On a hot summer day, the message from a kidnapper was spread by media and this case becomes a national concern immediately. And Jiwon doubts correlation between this case and Osun. Suddenly, when a death case occurs in police region and the daughter of the dead, Bora, disappears, Jiwon gets to know that Bora was the abused child who was under responsibility of Osun. When Jiwon realizes that Bora and Osun disappeared together, Jiwon decides to find Osun.
