Margot and Marguerite are 12-year-old girls who seem no different from any other youngsters with the usual family and peer problems. While they appear to have similar faces and body shapes, they wear different clothes and hairstyles, but the biggest difference between them is that one lives in 1942 and the other in 2020. When the girls crawled into a wooden chest they were magically sent into each other’s timeline, and because the girls look so similar their family and friends do not notice the swap.

What do you dream of when you're 16-years-old and in a seaside resort in Normandy in the 1980s? A best friend? A lifelong teen pact? Scooting off on adventures on a boat or a motorbike? Living life at breakneck speed? No. You dream of death. Because you can't get a bigger kick than dying. And that's why you save it till the very end. The summer holidays are just beginning, and this story recounts how Alexis grew into himself.

David is tasked to deliver a mysterious package from South America, only to find out he is carrying a baby Marsupilami!