A shipwreck leaves a young boy stranded on a lifeboat in the Pacific Ocean, forced to share his precarious vessel with a Bengal tiger. Pi Patel, the son of a zookeeper, must navigate the physical realities of starvation, dehydration, and the constant threat of his apex predator companion. The narrative framework utilizes a retrospective first-person perspective, alternating between Pi's account of his survival and the external investigation into the truth of his ordeal. This structure forces the reader to weigh the logical constraints of survival against the psychological necessity of belief.

Readers frequently highlight the stark contrast between the brutal physical struggle for survival and the philosophical inquiries that define the protagonist's internal life. Discussion often centers on the ambiguity of the ending, which invites multiple interpretations regarding the veracity of the events described. Critics often point to the meticulous world-building that makes the claustrophobic setting of the lifeboat feel expansive and terrifying. The balance between the visceral action of the survival sequences and the meditative prose creates a distinct reading experience that encourages repeated analysis. Many find the exploration of faith and storytelling to be the primary anchor of the narrative's lasting impact.