Seven-year-old Latina adventurer Dora has lost her teddy bear. Map, tucked in her backpack, points the way: the best chance of finding it is the Lost City. Alongside her monkey sidekick Boots, Dora navigates the Big Pond, the Number Pyramid, and the Lost City itself. Friends encountered along the route each have their own lost belongings, and Dora takes on their errands too — turning a personal quest into a broader adventure across three distinct environments.