The Gum Tree Gang and the Mystery at the Old Queenslander

Tracey and Krystal find strange messages at the Old Queenslander and share them with their obnoxious brothers, Kevin and Matthew, who decide to try and help their school buddies. They try their best to find out if they are pilfering but end up being blamed for shop lifting instead. Determined to fight crime, the four decide to wait and try to catch their friends before they ruin their lives. Everything goes wrong as they decide not to tell their parents of their plans... Will they end up in police custody or will they find a way out of the pickel they are in and prevent a serious crime!
They must make serious decisions to unlock the mysterious notes and try to finish the mission and end the mystery. What have bricks to do with the messages and who can solve the mystery in time?
Adventure packed mystery rolled into one.