The hereditary proof-reader and true Petersburg intellectual Roman arrives in the small Estonian resort Narva-Joesuu for inspiration, peace and quiet. He must proofread the encyclopaedia "Fish of the Baltic Sea", compiled in these places by the Nobel Prize winner, professor Polyansky. This work is very important for Roman. He would accomplish what he had planned, had he not once swum out too far and struggled not to drown. At the time, somehow, next to him appeared Helena who changes his ideas about the world completely and utterly.