In the house of old Mrs Watson, mysterious things are happening: doors open and close for no reason, curtains whisper, furniture moves by itself, and pictures fall off the wall. Poor Mrs. Watson dares not more home alone. For Molly and Pixie the matter is clear: a spirit has taken root in Mrs. Watson's house! The girls decide to spend the night and get to the bottom of the mystery. After spending a sleepless night alone in the house, Pixie and Molly call on their Girl Guide friends for help unmasking the house's spirits.

Aunt Vera has a great idea: she invites the whole family to a picnic in the countryside. Captain Jack chauffeurs grandma and Molly in the horse-drawn buggy while Pixie, Anne and Jimmy travel by automobile with Aunt Vera, a proven bad driver. Captain Jack's group arrives, but where are the others? Aunt Vera has gotten lost and the car breaks down. When Aunt Vera attempts to start it again, she hits her head and knocks herself out forcing Jimmy and Anne to drive for help.