A ghost and a French marquis wander through the Winter Palace in St Petersburg, encountering scenes from many different periods of its history.

The heroic deeds of the dolphin boy made him a legend among the sea creatures and the inhabitants of the island, but despite his fame, he feels lonely, because everyone around him expects only new achievements from him, and he has almost no real friends. In addition, he still does not know the story of his origin, even his real name is a mystery to the boy. The sudden appearance of huge whales and evil crabs in the sea strikes fear into the hearts of the islanders and sea creatures. Fate throws a new challenge to the dolphin boy, but at the same time gives him hope.

Not many people know that every house is secretly inhabited by little monsters! These furry creatures take care of a family’s house but cannot be seen. Finnick is a little monster, who doesn’t seem to care about his responsibility of making a home out of the house. But everything changes after a new family comes to his house. When Finn meets 13-year-old Christine, inexplicable events begin to happen in the city and life will never be the same again!

The film is based on the true story of Captain Marinesku and set in 1944 during WWII at the Russian Navy Base. Young and beautiful Tanka is in love with Aleksandr Marinin, the brave Captain of the Russian submarine. He is under the KGB surveillance, and his life is at risk. He takes his boat to fight the Nazi fleet, and he cannot come back home without a victory.

When a plane crashes at sea, dolphins rescue a little boy and raise him as family. He lives a carefree life beneath the waves until an evil monster seizes power over the underwater world. Banished to dry land, the boy is taken in by a kind-hearted captain. With his new companion's help, the boy embarks on a journey to solve the mystery of his true identity.

Liza, a young and optimistic woman, arrives in Saint Petersburg for the first time, enchanted by the city's poetic bridges, legendary embankments, and vibrant bohemian parties. As the day unfolds, unexpected connections form, leading Liza to discover that love might be found in the most unforeseen circumstances.