Koko and his friends are spending their summer vacation on the shores of a lake near the idyllic Green Hill. Soon the magical countryside is disturbed by unusual events: under the cover of night, burglars break into one house after another, stealing anything valuable they can find. When the police turn a blind eye, the kids decide to take matters into their own hands and unmask the burglars. Based on the book series by Ivan Kusan The Mystery of Green Hill is an action-packed adventure for teens that pays homage in tone and style to classics such as Stand By Me and The Goonies. In Croatian with English Subtitles .