Some farms are up in the hills ... or down long, winding lanes ... but Silver Street Farm is different - it's right in the middle of a town! It's winter and the residents of Lonchester are struggling against the Big Freeze. The ice on the canal is half a metre thick and there are snowdrifts two metres high! Meera, Karl and Gemma are delighted; school is closed which means they can be at Silver Street Farm all day. But there's no time to play - the animals need a lot of looking after in the cold. As the weather gets worse many people in Lonchester find themselves stuck without food. But a chance encounter with Boris, a sled dog belonging to a stranded Russian ballet company, gives Meera a brilliant idea. With the help of the dancers, Boris and some friendly police dogs loaned by Sergeant Short, the Silver Street kids set up Lonchester's first dog-sled delivery service and come to the rescue of all those in trouble!