Boots is too short to go on a ride, so he wishes to be bigger and becomes giant! Dora helps him go back to his normal size. Backpack has something special for Dora, but she can't open! They travel to Abuela on Tallest Mountain so she can fix her.
Dora's family makes a piñata for Mami's birthday, but it flies away! They have to get it back safe before Mami arrives. Swiper swipes an invisibility blanket! Now Invisi-Swiper is swiping everything, and it's up to Dora and Boots to stop him.