Arthur is a bright, clever and lively 10 year-old who spends his vacations at his favorite grandmother's house. And talk about vacations. Inside her garden there is a world invisible to the human eye. The world of - the MINIMOYS. One day, Arthur discovers a secret passageway that enables him to enter their world and become a MINIMOY himself. In fact, he becomes THE MINIMOY SAVIOR, helping these minuscule little people fend off all sorts of danger, including invasions by the armies of Maltazard, the MINIMOYS' sworn enemy, a despot who rules over the SEIDES. A dreamer and a bit of a loner, Arthur suddenly becomes a fearless hero, and along with his friends Selenia and Betameche, he is going to lead the little people to freedom. But with a trio like this, the road to victory is going to be full of surprises.
It is the day of the Great Snooze. The trio needs to find something that stops the Minimoys' sleeping. Arthur, Selenia, and Betameche look for McSlick, but they cannot find him anywhere!
The Minimoys celebrate the Day of the King. For one day, King Sifrat gives up his throne to a random Minimoy. The choice accidentally falls on Margoul!
Betameche decides to equip his multi-function ball with an accessory that allows him to locate it by whistling. However, he does not see that a flea enters the ball too.
Maltazard invites Sifrat, Arthur, Selenia and Betameche to come in peace to celebrate his birthday. Everything goes fine until Maltazard sends a Chilop after them.
Wise Miro falls under the effects of an ancient spell cast by Maltazard. Arthur, Selenia and Betameche disguise themselves as reporters and interview Maltazard.
Selenia accidentally comes into contact with Arak's venom. She is unaware she's been infected and her behavior changes-much to Arthur and Betameche's dismay.
