Follows the lives of a group of rabbits as they leave their endangered warren in search of a safe new home. They travel across the English countryside, braving perilous danger, until they find a hill called Watership Down, where they begin a new warren. However, they face various threats and are soon forced to defend their home and lives.
Seven of the rabbits from Sandleford Warren set out in search of the 'High Lonely Hills' that Fiver has seen in a vision as being a place of safety. Along the way they encounter many dangers such as the river and a dog.
The rabbits begin to settle into their new home on the down, however problems become apparent. The burrows need digging, but there's only one doe and bucks don't dig!! There's also a weasel that arrives at the down. Meanwhile, a mysterious visitor is looking for Bigwig.
In search of Pimpernel, the rabbits travel to a nearby warren believed to be a place of safety. This warren, led by Cowslip, seems a little too good to be true...and it is!
Free from Cowslip's warren, Strawberry begins to settle in at the down. Meanwhile, Bigwig hears of a vicious warren called Efrafa and investigates further.
Hazel, Fiver and Bigwig decide to take a visit to Efrafa after hearing reports that Efrafa want to kill all outsiders. Hazel encounters General Woundwort and asks him a few questions, unaware Woundwort is set out to kill him. While there, Hazel falls for a rabbit called Primrose. After Fiver has a vision about Woundwort's past they escape, making a new enemy in the process.
Hazel travels to Nuthanger farm with Pipkin and Fiver to get some new hutch-rabbits to come and join them, in fear that if they don't have enough rabbits living with them they will be wiped out by Efrafa. Hazel heads for trouble involving a man and a gun. They bring back a new rabbit, called Clover.