In episode one, Liz Bonnin joins a scientific team aboard the research vessel the Alucia on an expedition across the Galapagos Archipelago.The journey begins on the Galapagos' west side at the youngest and most volcanically active islands in the archipelago, Isabela and Fernandina, home to a richly diverse wildlife scene. Here, Liz and the team journey into the clouds above ‘Wolf', the tallest volcano in the Galapagos, where they join a group of biologists hunting for the rarest of species: the elusive and bizarre pink iguana, which teeters on the edge of extinction. But how and why did it come to live on the top of a volcano?