The summer is unbearably hot. But Josie Smith – and her mother – always comes up with something: she is allowed to splash about in an old barrel in the yard. At this, even her spoiled friend Lena becomes envious and doesn't stop complaining until she too can play in the pool. What does it matter if the water ruins Lena's curls? With her 'magic hairspray', Josie's mother will soon put everything right again.