On Sea Island, Equitrekking host Darley Newman rides with a naturalist and tries what the island natives call "swim riding." On secluded Cumberland Island, Darley observes wild horses with local naturalist Fred Whitehead, who speaks about herd dynamics, the history of horses on the island and how they survive in the subtropical environment. Darley stays at the island's only lodging, the historic Greyfield Inn, and learns about the Carnegie family's role in the island's history. Next, Darley visits Jekyll Island, where she rides through the remnants of an ancient maritime forest on Driftwood Beach and strolls through the historic district to delve deeper into Jekyll's unique past.