Arthur is thrilled. Tonight sees the end of the moon's tenth cycle and he will at last be able to return to the land of the Minamoys and be reunited with Selenia. But Arthur's father chooses the eagerly awaited day to announce that the family is cutting short their vacation at Granny's house to return to the city. As they are about to leave, a spider deposits a grain of rice with an SOS engraved on it in Arthur's hand. Selenia is in danger... and Arthur doesn't think twice about flying to her rescue. Even if it does mean improvising a perilous passage, falling head first into Max's bar; bumping into the troops of Krobb, the new tyrant of the Seven Kingdoms; saving Betamaeche's skin; fighting rats, frogs and hairy spiders.. only to discover, when he arrives at the MInimoy village, that they never sent him a call for help ! Who is responsible for laying such a cunning trap for our young hero Arthur?