In Canada a young writer meets Pi Patel. The writer told that pi's life story will be a great subject to write a book. Pi tells the writer the following story about his life:

Pi's father names him Piscine Molitor Patel after the swimming pool in france. In secondary school in Pondicherry, he adopts the name Pi to avoid sound alike nickname “Pissing Patel”. He is raised in a hindu family but at 12 year old he introduces to Christianity and the Islam and then decided to follow all three religion as he just want to love god. His mother supports his thought.

Pi's family owns a zoo and Pi takes interest in animals especially a bengal tiger named Richard Parker. After getting very close to tiger his father forced  him to see the tiger killing a goat. When Pi was 16 his father decides to move to Canada, where he intend to settle and sell the animals. The family books passage with the animals  on a Japanese freighter. During a storm the ship founder while Pi on the deck. He tries to find his family but a crewman throws him to a lifeboat. A freed zebra jumps onto the boat by breaking his leg. The ship sinks into Mariana Trench drowning his family. 

After the storm Pi awakens in the boat with zebra and joined by an orangutan. A spotted hyena emerges from under a tarpaulin covering half of the lifeboat. The hyena kills the zebra and then orangutan. Richard Parker emerges from under the tarpaulin killing the hyena.

Despite his moral code against killing animals , Pi started fishing. When the tiger jumps into the sea to hunt for fish and then comes threateningly towards Pi , Pi considers letting him drown but ultimately helps him back into the boat.

Weeks later they encounter a floating island of interconnected trees. Pi deduces that the island is carnivorous. Pi and Richard Parker leaves the island, eventually reaching coast of Mexico. Pi is saddened that Richard Parker does not acknowledge him before disappearing into the jungle. He is rescued and bought  to the hospital.

Insurance agents interview him but do not believe his story and asked him to tell reality. He tells a different story in which animals are replaced by human survivors. The insurance agents remains dissatisfied by his story , they leave without questioning Pi further.

The writer recognises the parallel between the two stories , noting that in second story Pi is actually Richard Parker. Pi tells it does not matter which story is true because his family died in either way. He then asked which story the writer prefers, writer chooses the first to which Pi replies , “and so it goes with god”. Glancing at the copy, the writer reads aloud that Pi survived is his great adventure “in the company of the adult Bengal tiger”.

THE  END