Five friends George, Jullian, Dick, Anne and their faithful dog Timmy are back with new adventures. As they went to the legendary swamp, they learn about the mysterious and noble warrior, who long time ago saved from thieves the largest emerald and hid it somewhere in these parts. There they meet another boy named Hardy. Suddenly, Dick is kidnapped instead of Hardy. The kidnappers believe Hardy knows where the emerald is hidden, and his friends rush to save him.