It is said that odd people live behind the long brick wall of the village. Everyone speaks, but nobody has seen them. When his balloon is sent behind the wall by Fournier, Thomas does not have the choice: he must climb it. He will then discover a fisherman who fishes without hook, a police officer armed with a fly agaric, a giant who cries without stopping… Different people, yes, but interesting. Will Thomas be able to go beyond his fear and prejudices to learn who these mysterious characters are?