Elementary school swimming lesson. Warm-up, jump into the water and underwater ballet. The camera embraces the whole group, but also closely follows the emotions on individual faces. The children experience the whole gamut of emotions: concentration, gathering courage, hesitation, resignation, embarrassment in front of the group, the joy of getting to the surface, the relief of reaching the shore. Finally, a sense of tameness and a desire to explore the underwater world. At the bottom, children's toys are waiting to be brought out: a spinner and a swan. The underwater shots are accompanied by an unearthly world of sound, created in the Experimental Studio of Polish Radio.