Grandpa Nat, Molly, and friends are whisked across Rutan Hill, New Jersey in a hot air balloon! With Grandpa Nat due to give an important talk, the fastest way to get back in time is by using a traditional Lenape dugout canoe! Will they make it?
While visiting the Shoshone-Bannock Tribes, Grandpa Nat leaves behind a microphone that he needs to do an interview for his documentary. Using lessons from the Indian Relay Race - and a maze of lava tubes - can Molly and Stormee get Grandpa his mic? After hearing the Shoshone-Bannock story about Doe'gwo'ah, the Big Snake responsible for creating the Craters of the Moon lava fields, Molly and her new friend Stormee encounter a real rattlesnake when retrieving Grandpa Nat's wayward drone!
Molly finds a newt in her boot while exploring Wizard Island! Her friends from the Klamath Tribe teach her the importance of returning the newt to its natural habitat, but can Molly keep track of Cutie Newtie until she gets back to Crater Lake? Molly takes a rock from Crater Lake, but learns that it's against Klamath traditions to do so after hearing an old, spooky tale about the "Old Man of the Lake." Guilt-stricken, Molly tries to do right by returning the rock to its rightful place.
When Molly arrives in Shiprock, home of the Dine people, she's excited to gift beaver mittens to her new friend, Kevin. But, when she is hit with the desert heat, she worries they may not be a good gift. Can she salvage this gift-giving snafu? Grandpa Nat's new drone gets swept away by a dust devil when showing Molly an ancient Diné volcano in Shiprock, New Mexico. Determined to recover the lost drone, Molly and Grandpa Nat must use clues within the pictures it snapped before it crashed.
When Grandpa Nat and Molly travel to Hawaii to learn about the volcano Mauna Loa, Molly makes a wish to see it erupt. But, when her wish comes true, she looks to the story of Princess Ruth Ke'elikolani's offering to help find a way to stop it.