1899, Christmas Petersburg. Bright festive life boils on the ice-bound rivers and canals of the capital. On the eve of the new century, fate brings 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 the silver-plated skates inherited by inheritance; Alice is the daughter of a major dignitary, dreaming about science. Each has its own difficult story, but once faced, they rush to a dream together.