Fourteen-year-old Rustam lives with his mother in a village; his father was killed by the Russian mafia. After his father's death, Rustam tries to provide for himself and his mother without resorting to illegal money-making schemes. But his dream is to join a music band. The title of the film refers to an Azerbaijani fairy tale about saving a princess from a house with 40 doors; no one has succeeded in opening the last door, and thus its secret remains hidden. The villagers have named their village the 40th door as well.

A film about the life and work of the Azerbaijani immigrant journalist and writer Mohammad Asad Bey, who emigrated to Germany after the collapse of the Republic of Azerbaijan at the beginning of the 20th century