Part 1. Blooming field of poppies. View of the destroyed ancient fortress on the bank of the river. Waves roll onto the shore. Archaeologists are excavating. Old map of the Danube Delta. Sun glare on the water. Thickets of grasses and bushes in the lower reaches of the river, which form floating islands on the river. Members of the expedition to study floating islands, move around the newly formed island (chirping of birds is heard). A view of an inverted floater. The structure of these formations is made up of rhizomes of reeds, which provide buoyancy. Employees use special anchors to determine the speed of movement of the islands. A fisherman on a boat is looking for tackle, set among the floating islands. A member of the expedition takes pictures of the flowering vegetation of the floating island, two employees explore the fauna of the sludge. Inhabitants of the smoother: turtles, marsh hens, muskrats, minks, raccoon dogs, wild boars. Moon over the water surface of the river. Part 2. Accumulation of swimming pelicans in the floodplain zone. A flock of pelicans over a floating island during a storm. Driven by the wind, the floating island floats. Seagulls over the waves.