PD has determined that for her playdate at the zoo, she will be a safari adventurer, not a detective. But when the elephants go missing, along with Aunt Dot, a detective is exactly what is needed. Thankfully Grandpa has packed a 'Just in Case case', and soon PD has her trusty magnifying glass, notebook and trilby hat ready to go.  But where on earth could the elephants be? They are not exactly easy to hide! It soon becomes clear that Ranger Steve knows something … can PD and Theodora uncover the truth before it's too late?