A shipwrecked mariner must navigate the psychological and physical isolation of a deserted island after a catastrophic storm leaves him as the sole survivor. Crusoe struggles to establish a sustainable existence, utilizing salvaged materials and his own ingenuity to construct shelter, cultivate crops, and defend his territory. His objective shifts from mere survival to the maintenance of his sanity and social order, while he faces the constant threat of nature and the potential arrival of hostile outsiders. The narrative is presented as a first-person journal, documenting his daily labor and spiritual reflections over several decades.

Readers and critics frequently analyze the text as a foundational work of realistic fiction that popularized the survivalist subgenre. Discussion often centers on the protagonist's complex relationship with his environment and the colonialist implications of his interactions with the island. Scholars highlight the meticulous detail Defoe employs to make the narrative appear as a factual account, which successfully deceived many contemporary readers. The balance between practical survival mechanics and the character's internal spiritual development remains a primary focus for those examining the work's enduring influence on literature.