Sam Gooris, wife Kelly Pfaff and his children Kenji and Shania settle on board a Volkswagen van with which they tour Europe. They stop at several iconic places that have a lot of meaning for him or the family.
Lui eats a dangerous berry, despite Plop's warning, and grows as tall as a human. The gnomes get angry, so Lui runs away crying and gets lost in the forest. Before he knows it, he ends up in the city, causing chaos wherever he comes..
