Ukraine 1918. As a Bolshevik army of about 4.000 men commanded by General Muravyov advances towards Kyiv with the aim of capturing the city a small Ukrainian unit of 400 soldiers -about 300 of which are students- is resisting near the railroad station of Kruty. The clash between the opposite and unequal forces rages with terrible fury. Young people like Spartan soldiers sacrifice themselves in a struggle against aggressors.