In a magical world filled with tiny creatures, Arthur, the young hero from previous adventures, faces a new and dangerous challenge. After having defeated Maltazard, the wicked king of the Minimoys, peace seems to have returned to his universe. However, a dark shadow looms over the kingdom, as Maltazard has managed to escape from his prison and is determined to take revenge on his old rival. With a malevolent plan that encompasses both the human world and that of the Minimoys, his goal is clear: to seize the kingdom and destroy Arthur.
Meanwhile, Arthur's sister, Selenia, is in grave danger, turned into a pawn in Maltazard's twisted game. Arthur must find a way to rescue her, and along with his friends, the brave Minimoys, he embarks on a thrilling adventure. They travel through enchanting landscapes and face perilous challenges, confronting mythical creatures and clever traps.
As the tension builds, Arthur realizes that the only way to stop Maltazard is to dare to enter his world and face him head-on. With the lesson that bravery doesn’t always mean being the strongest, Arthur will discover the importance of friendship, loyalty, and the power of hope amidst adversity. The epic struggle between good and evil reaches its climax as Arthur prepares for the final confrontation that will change his life forever.