Single mother Maria lives with her son and daughter in a science city, which is being prepared for liquidation. She believes that her physicist husband, who disappeared six years ago during a scientific experiment, is somewhere nearby — just in another dimension. A former colleague of her husband arrives in the city in search of the missing person's records, and Maria has a boyfriend-trucker Stas, ready to take her away with her children and start a new life together. Faced with a choice, a woman can not decide to leave her invisible husband.

The governor asks his wife to stage this beloved folk ballet, which should be good PR for his upcoming elections. But it turns out that Swan Lake is also a ballet about two worlds. Trying to fulfill her husband's order, the governor's wife breaks out of the boundaries of the estate, regulated by the world of reconstructions. In the city, she encounters "ordinary people" unknown to her, sleeping swans.

Roman is a born proofreader from a family of proofreaders, a real intellectual from St. Petersburg who comes to Narva-Jõesuu, a small Estonian spa town, to find inspiration, tranquility, and silence. He does proofreading of the encyclopedia of the Baltic Sea Fishes, compiled in the same location by Professor Polyanski, winner of the Nobel Prize. This work is very important for Roman. He would have accomplished his task, but once he swam too far in the sea. It was then that Helena came into his life, to change his ideas about the world forever.