Pitjewiet comes round to ask Hugo for a job. But the scarecrow takes a nap after dusting down just four toys. At that moment a thief called Pieter Lepeltak arrives and proceeds to take Pitje's stuffing.
It's the anniversary of Hugo & Henriëte's growing to full size, so together with Pitjewiet they decide to have a birthday party. A magician comes round and sells a box of magic tricks to all three of them.
A lady asks Hugo to take care of a mysterious Time Box but not to tamper with it at any cost. Naturally both Hugo and zoo-keeper Frits end up traveling through history and the future.