Braslet-2 is a grey trotter at a Russian race track stable. Daily beatings from a cold-hearted trainer turns him into an unreliable emotional wreck, and in race after race he breaks his trot and finishes at a gallop, resulting in disqualification. To the trainer Braslet is worthless, so when World War II breaks out and Soviet Army representatives come to the track to requisition horses for the front, the trainer is only too happy to be rid of him. Now, instead of a racing sulky, Braslet is forced to pull heavy carts and sleighs laden with munitions. Gradually he resigns to his fate...