An interstellar expedition is sent to study a strange planet. Despite the fact that creatures from various Earth time periods inhabit the world, the natives possess metal swords, even though they should have no knowledge of such weaponry.
While doing their work on the deep underwater station two aquanauts discover strange mystery: it seems as if one of the aquanaut's girlfriend who recently died in a car crash had turned into a big manta fish. That manta writes words on the station's port-holes and tries to draw attention many other ways.
Defeating the terrible dragon, the soldier Ivan returns from the war. The Far Far Away rejoices. The king, also Ivan, is very pleased. He awards the namesake with an order with pearls, appoints a field marshal and offers his wife his own daughter Maria Louise. But the soldier suddenly refuses everything.
