Pi Patel is stranded in the middle of the ocean all alone, except for a hyena, orangutang, and an adult Bengal tiger. His struggle for survival forces him to make sacrifices he's never made in his entire life and may prevent him from being rescued.
Pi's father owns a zoo in Pondicherry and as Pi, as a young boy, believes that all animals will be kind to you if you are kind to them. Due to this, his father shows him what animals really are by throwing a live sheep into the tiger pen and makes Pi watch the sheep die as a lesson that all animals are not friendly in the wild.
While shipping the zoo animals across the Atlantic Ocean, something goes wrong on the cargo ship and it begins to sink, taking Pi's family, crew workers, and various animals. Pi is thrown onto a lifeboat and within minutes the boat disappears. He is now stranded alone with no help and must figure out what his best options are.
He wants to know what you mean by a Tiger
The Climax of the story occurs when Pi nearly loses all hope of rescue. He recognizes his hunger and failure to collect fish and clean water so he places a wet rag over his face to become unconscious, resulting in vivid dreams about him finding an island with life on it. This dream indirectly gives him mental motivation to then carry on with his survival.
The falling action of the story is when Pi washes up on the shores of Mexico. As he falls onto the beach, he watches Richard Parker vanish into some brush. Within a few minutes, he is found by local people and taken to safety.
The resolution occurs at the very end of the story when the head of the cargo ship company speaks to Pi about what happened. Pi shares his story about the animals and they don't believe him, but he shares the true story involving real people, and it sounds gruesome and horrific. So they use the animal story for the news instead.