The novel explores the survival and ingenuity of the protagonists as they work together to build a new life on the island. The group consists of Cyrus Smith, an engineer; Gideon Spilett, a journalist; Pencroff, a sailor; Harbert, a young boy; and Neb, a former slave. As they face various challenges, including hostile wildlife and strange occurrences, they discover that the island holds secrets, including a hidden benefactor who aids them in their endeavors.