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'