A friendly competition to grow the best organic garden is underway. The prize is tempting--a ribbon, a photo and article in the newspaper, and some all-you-can eat favorites from Ned's Diner! Esmeralda, Annie, Oliver, and Rosamond are among the competitors. Just a few days before contest judging, some of Rosamond's tomatoes go missing, and Nate and Sludge are called to investigate.