Tired of the monotonous life every day, Shaun the Sheep decided to make some changes. He instigated his companions to participate in his plan, distracting the dog Bitzer and hypnotizing the farmer. But their happy holiday has not yet begun, and an accident suddenly happened. The trailer with the farmer lost control and rushed all the way to the city center. Bitzer ordered the sheep to return to the farm, and he ran to rescue the farmer in a panic. The farmer, who finally woke up, had no idea what happened, and then suffered a head impact and lost his memory. On the other side, the farm was in chaos under the scourge of three fat pigs. Sean, Timmy, Sherry and others began to miss the serious farmer. To make a go of it, Sean packed his bags and got on the bus to the city center, and his companions followed without saying hello. However, the situation in the city is extremely complicated, and the ruthless dog catcher has become an insurmountable obstacle for the sheep...