When Shaun decides to take the day off and have some fun, he gets a little more action than he bargained for. A mix up with the Farmer, a caravan and a very steep hill lead them all to the Big City and it's up to Shaun and the flock to return everyone safely to the green grass of home.

Plot

Shaun, a mischievous sheep living with his flock at Mossy Bottom Farm, is bored with the routine of life on the farm, he concocts a plan to have a day away, by tricking the farmer into going back to sleep by counting the sheep repeatedly. However, the caravan in which they put the farmer to bed accidentally rolls away, taking him the entire way into the city. Bitzer, the farmer's dog, goes after him, ordering the sheep to stay on the farm until he returns.

The farmer receives a blow to the head and is hospitalized, where he is diagnosed with amnesia, and leaves the hospital. He wanders into a hair salon, where he cuts a celebrity's hair as if he was shearing a sheep. The celebrity loves it, which leads the farmer to be known as the mysterious hair stylist "Mr. X".

Meanwhile, the sheep find life impossible without the farmer, so Shaun sneaks on a bus to the city; the rest of the flock follow him on another bus. He manages to disguise them as people and they begin looking for the farmer, but Shaun is captured by Trumper, an over-zealous animal-control worker. Shaun is reunited with Bitzer in the animal lock-up, and with the help of a feral dog named Slip, they escape. They find the farmer, but he does not recognize Shaun, who is heartbroken by his owner's hostility.

Shaun learns about the farmer's memory loss, and he and the flock devise a plan, which involves putting the farmer and everyone else to sleep with the sheep-counting trick, returning him to the trailer on a fake horse (really the sheep in an elaborate disguise), and hooking the trailer up to a bus returning to Mossy Bottom. The plan is initially successful, but they are pursued by Trumper who becomes insane and intent on killing them outright.

At the farm, the group hide in a shed, which Trumper tries to push into a nearby rock quarry. Fortunately, the farmer wakes up, regains his memory, and through teamwork, Trumper is defeated. The farmer and the animals have a renewed appreciation for each other, and the next day, the farmer cancels the day's routine activities. Slip leaves, but is adopted by a bus driver who finds her on the road. The animal-control service is turned into animal-protection centre, and Trumper, no longer welcome there, finds work wearing a chicken suit to promote a restaurant.

Watch Shaun the Sheep Movie (2015)