When night falls on St. Petersburg, there comes a time when it seems that everything freezes. The past, the present and the future exist simultaneously. There are two on the bridge: He is a shy and lonely dreamer, who photographs the city all night long, feels sincere sympathy for strangers, and even houses. She is a delicate girl, in love, her face is light, but tear-stained. Four nights of revelations and romance, sadness and smiles, kisses and embraces. But one day the morning will come.

An impressing war drama, a story of life and heroism of Naum Balapan - an academic psychiatrist, Doctor of Medicine, a chief doctor of the Sevastopol psychiatric hospital since 1922. With the help of his wife he saved dozens of innocent people from Genocide during Nazi Occupation until his tragic death in 1942.

In present day St. Petersburg, police major Igor Grom, an honest and skilled cop with unconventional methods, pursues a vigilante murderer in the mask of a plague doctor.