Four young people go on a picnic. For relaxation we chose a cozy place near a picturesque lake not far from the sanatorium. Not a landscape, but a picture! Quiet forest, mirror-like surface of water, blue sky... In such a paradise - just drink wine and make love! This is what the young people devoted the whole evening and night to. And in the morning... in the morning a gloomy hangover came: the company was missing Nina. Drowned? Lost in the forest? Did you go home? We started looking around, but found only part of the girl...