Nicolas has a happy existence, parents who love him, a great group of friends with whom he has great fun, and all he wants is that nothing to changes. However, one day, he overhears a conversation that leads him to believe that his life might change forever, his mother is pregnant!. He panics and envisions the worst.

One of the darkest moments in French history occurred in 1942 Paris when French officials rounded up over 10,000 Jews and placed them in local camps. Eventually over 8,000 were sent off to German concentration camps. As 10-year old Sarah and her family are being arrested, she hides her younger brother in a closet. After realizing she will not be allowed to go home, Sarah does whatever she can to get back to her brother. In 2009, a journalist named Julia is on assignment to write a story on the deported Jews in 1942. When she moves into her father-in-law's childhood apartment, she realizes it once belonged to the Strazynski family, and their daughter Sarah.

Arthur did as a boy what only grandpa, a fellow nature buff, did as an adult: pass, as white man, the Bogo tribe's tests of harmony with the natural worlds of trees, minerals and animals. To answer a mysterious call fro help from the Mimimoy people, he enters their world miniaturized. By the time he works out with friends it was a trick, the mastermind has already escaped, ready to strike in our world.

A French tradesman travels in time and liberates an oppressed tribe in another world.

Maltazard, the Evil M, is now 7 feet tall and evolving among the humans, causing terror wherever he goes. His goal is simple: forming an army of giant henchmen and ruling over the universe. Meanwhile, Arthur is still a Minimoy, and thus in a state where he's unable to fend him off. With the help of Selenia and Betameche, he hatches a plan to regain his usual size: all they must do is infiltrate Arthur's house through the pipeworks, catch an electric train from his bedroom to his grandfather's study and find an elixir that will make him grow back to his human size. Sounds simple enough, if it weren't for Darkos, Maltazard's own son, hot on their tails.