It's Halloween, a witch's favourite night. Gertie had big plans involving toffee apples, but instead, she finds herself on a little adventure with a little friend who needs her help. After all, that's what witches do, right? Though, as Gertie and Rhubarb start the search for the stolen sweet bag, they stumble into a dark wood with creatures trying to steer them from their path. A path that leads them to the fairy lair. Will they find the sweet bag? Will the children run out of treats on Halloween? Only Gertie and Rhubarb can save the night.