The high school students decide to conduct their own investigation and figure out the culprit. A detailed study of the circumstances of the death of the guy leads to an unexpected discovery. Residents of cozy houses keep terrible secrets hidden from prying eyes. The grim side of the quiet city raises a lot of guesswork and speculation. The suspect is Jason's sister, who clearly knows something. Gradually, the secrets of the local population become known to young detectives. Having started the investigation, the teenagers could not assume that they would open the past and open Pandora's box.