Just as Michel Vaillant returns to the top of the podium, he is brought down once more—and not by one of his usual rivals. Suspected of homicide in the death of his brother, Michel suddenly finds himself behind bars. He has no plans to rot away in prison, however, and quickly regroups. With the help of his son, he soon leaves his cell behind, which allows him to turn his attention to the other tasks at hand: returning Vaillante to its rightful place atop the racing world, and reclaiming the family business that has been stolen from them. And the Macao Grand Prix may just give him the opportunity to do both...