A-i-deul... plot
"Five missing children, They never came back."
Five children set out on their own to Mount Waryong to catch frogs. They disappear without a trace, after which the whole of South Korea sympathizes in the hope that the 'frog children' will be found again. Two years later, however, the case has fallen into oblivion again, until Ji-Seung Park, a reviled documentary maker after parts of his award-winning documentary were revealed to have been staged, decides to delve into the case. He is eagerly looking for a smooth story to polish his own reputation and finds in Professor Hwang someone who thinks that one of the parents is responsible for the disappearance of the children. Based on a true story.