The film Mask aims to show the precious family relationships that are being lost today, the hypocritical people wearing masks, and the phenomenon that is increasingly common in today's society, where people forget their friends for the sake of money and fame, in a humorous and adventurous way. In the film, when Director Damiran faints and is taken to the hospital, his assistant Bayar finds a young man who looks like Damiran and works in his place to save himself. While the young men continue their work successfully, Damiran regains consciousness and fires them. However, in the end, the replacement turns out to be Damiran's son.

The Khan of the Mongol aimag secretly sends his warriors to take the princess of Bokhem from the Khan of the Nirut aimag to his prince Sorogto. Because according to the words of Princess Saran and her mother, Queen Gilben, the tribes are discussing the need to give birth to a son who will unite everything under the sky. However, getting the princess is very difficult. Bokhem Khan is protecting the princess from the "crazy tiger Crab" who killed his brother Sargai agi in order to become the Khan of Nirut. A complex story involving the Mongolian aimag general Chuns, his son Beret, the leading warriors Tungar, Suder, Ayanhal, and the Nirut warriors Sukhlai, Khalchir, and Erloy shaman... Who will give birth to the TNGRI boy who will establish peace in the universe?

The film depicts the struggle of brave men and women who sacrificed their lives for their homeland, their love, and everything they held dear during the 1939 Khalkh Gol War.