Dora's mami is having a baby and Dora is eagerly awaiting the new arrival...she just can't wait to be a big sister! But when Dora arrives to see the new baby, there's a big surprise waiting for her...Twins! Now Dora has a baby brother and a baby sister!

Dora tells a true but silly story to her family and friends about the time she and her entire family caught her baby siblings. In her story, her baby siblings are aboard a runaway stroller headed towards the Gooey Geyser. This wakes Dora's family up in a flash and they must quickly prevent the babies from rolling into it!