1899, Christmas Petersburg. A vibrant festive life rages on the ice-bound rivers and canals of the capital. On the eve of the new century, fate brings together those who, it would seem, were not destined to meet. People from completely different worlds, Matvey is the son of a lamplighter, his only wealth is his inherited silver-plated skates; Alice is the daughter of a major dignitary, dreaming of science. Each has its own difficult story, but once they collide, they rush to the dream together.