Reynaldo has entered a cross-country bike race. He's practiced and ready and things look promising, all due to his lucky helmet. But the neighborhood bully, Jaws, and his buddies, the Sharks, also want to win the race. They make off with Reynaldo's helmet and now Reynaldo has decided he can't race without it. Rubik, Carlos, and Lisa come up with a plan to retrieve the helmet, and nearly pull it off. The only other solution is to replace the hemlet with a duplicate. And on the day of the race Reynaldo gets to find out whether it's his skills or his lucky helmet that will help him beat Jaws.