Charles-Henri the snail thinks he’s the fastest animal on the island ! So as not to hurt his feelings, Roger and Fatou lose the race against him on purpose but far from sitting on his laurels, the snail then challenges Zoltan the dolphin to a race...in the water. Faced with the dolphin’s extraordinary arrogance, Roger and Fatou decide to help Charles-Henri win the race. But their clever strategy is going to endanger all the inhabitants of the island!