Wolfie trains Oso to follow Dotty without letting her see him. But during his mission, he loses sight of her. That's when Oso gets a special alert. Two brothers, Luis and Miguel, are shopping for a piñata for their sister Mariana's quinceañera (15th birthday party). Neither of them know how to prepare the piñata for the party. So it is up to Oso helps them get the piñata ready for Mariana's quinceañera before the guests arrive.