The Thornberrys are at the Yasuni National Preserve in South America near the Gallapagos Islands. They are there to see Lonesome Jake the last Tortoise of his species. Eliza feels terrible that he is the last one and is determined to search out a female...she asks the local animals and hears of one that lives in a volcano on the Gallapagos. It's a female named Samantha and they bring it back to Jake but Eliza's interfering matchmaking ways cause more harm than good. Love is also in the air for Donnie who finds a jungle girl who is his perfect match.