1899, the Christmas-time St.Petersburg. Ice-covered rivers and canals of the capital seethe with festive activities. On the eve of the new century those who should not be destined to meet, come together. They are people from different worlds: Matvey, the son of a lamplighter, whose only treasure is his silver-plated skates; Alice is the daughter of a high-ranking official dreaming of science. Each of them has his own difficult life-story, but having accidentally met they rush forward together in pursuit of their dreams.

Michele is a Communist MP who loses his memory in a car crash—although nobody seems to notice. Over the course of a water polo match ahead of election day, he begins to remember his past life, revealing the picture of a man whose personal and political identity crisis mirrors the one of Italian communism.

Mathieu is a young and talented black box analyst on a mission to solve the reason behind the deadly crash of a brand new aircraft. Yet, when the case is closed by authorities, Mathieu cannot help but sense there is something wrong with the evidence. As he listens to the tracks again, he starts detecting some seriously disturbing details. Could the tape have been modified? Going against his boss' orders, Mathieu begins his own rogue investigation - an obsessional and dangerous quest for truth that will quickly threaten far more than his career...