Since she is now in junior college, Bobbie Jo thinks she's all grown up. She decides to go to an all night party with her friends. Kate refuses to let her go to the all-nighter, despite Bobbie Jo telling her that all the other mothers are letting their daughters go. Kate learns that none of the mothers want their daughters to stay out all night. Kate says Bobbie Jo can stay out until 01:30 and the Cannonball will be ready to pick the girls up at that time. Bobbie Jo and all the other girls plan to stay out all night anyway. Bobbie Jo and the girls decide to go home, but Kate has a surprise waiting for her and the others on the Cannonball.