Following sabotage against the Tikis during training, the Pirates are accused of cheating and find themselves suspended from the competition. Persuaded that they are the victims of prejudices concerning their people of the Shores of Shores, Mouse decides to support them despite Corto's incomprehension. The pilot decides to go investigate the Toiles circuit to prove to Mouse that she is wrong. But the Mirages are actually behind the sabotage and Corto will sacrifice his race victory to be reconciled with his friend.