How do you ask a wild, impetuous hairdresser on a date if you're a pathologically timid philosophy student with no social skills?

"Once upon a time ... the Americas" tells us the story of this vast continent, from the very first inhabitants to the present day, including the Aztecs and the Incas, the conquistadors, the war of independence or the gold Rush. Through our usual sympathetic heroes (Maestro, Pierrot, Petit Gros, le Teigneux, le Nabot, etc.), we travel from time to time, always with the aim of teaching us something.

Attention please! Are you ready for an adventurous tour through the human body? With a lot of humour, our physical appearance is being introduced from head to toe along cells and organs in an educational way. The heart, blood, nerves and kidneys, each single one is a miracle which renders life possible.

Marc Lafarge, 13, is idolized by his brother Thomas, 20, future veterinarian and amateur boxer. Thomas has a soul of justice. Thus, returning home with Marc after a fight, he hits a little thug who has just robbed an old lady.