Bécassine, a naive and clumsy farm girl, is hired as a nanny in a bourgeois family.
When the first snow falls in the valley, it is urgent to prepare its reserves for the winter. Alas, during the operation, a small ladybug is trapped in a box - to the Caribbean. One solution: reform the shock team.
Zombillenium, the Halloween theme park, happens to be the one place on earth where real monsters can hide in plain sight. When Hector, a human, threatens to disclose the true identity of his employees, the Vampire Park Manager has no other choice but to hire him. To see his daughter, Hector must escape from his Zombies and Werewolves coworkers.