When Trixie and Honey decide to collect herbs to replace their teacher's damaged collection, they discover Martin's marsh and the strange old woman who lives there. The mystery develops when a blonde child prodigy, staying with the Wheeler's, mysteriously disappears. A nuisance reporter suggests a kidnapping and the hunt turns to Martin's Marsh where Trixie meets Miss Rachel Martin and learns the mystery of Martin's marsh. Gaye is found but questions remain unanswered as Trixie and Honey try to help an unhappy child and stop Miss Martin from being evicted from her home.