Mat is finally old enough to join his father’s army. He announces to all that he is quitting school, to the dismay of Aly. Mat's father still considers him too small and too thin, and does not let Mat join him on the battlefield. To prove that he has all he needs to make a good soldier, Mat goes alone in the Black Forest...

Noting that his daughter is disconnected from the reality of the people, the King obliges her to attend school with the other young people of the kingdom. Knowing that his daughter is abusing her status, he orders Aly and Ti-Gilles to teach her the real life, including heavy daily chores. But the Princess has not said her last word.

Mat is the victim of a robbery at the convenience store. Because of his reaction, he loses his confidence... until he accidentally knocks out Lord Gaga, a pop star and Aly's idol. Aly ends up in jail when Princess Two finds her behaving suspiciously.

Jean-Merlin asks the kids to bring a magical or fantastic object to make an oral presentation. Mat decides to bring a dragon, but he must first capture it! For lack of luck, he rather finds himself with a turkey that he must cook for a duke with a temper.

Princess Two is outraged when she learns that her father wants to marry her to a prince from a neighbouring kingdom. Charles-Henry tries by all means to complete his collection of knight cards. Only one card is missing, the one with only two printed copies.