The picture features the life and deeds of Boris I - strong historic personality, which completes his mission to the full and at the end of his life receives holy orders. Prince Boris I is ruling in the late 9th century. In his youth, he, the brilliant statesman and diplomat, is experiencing heavy defeats in the wars he wages against his neighbors. Nonetheless, he manages not to cede any territories to the enemies. Under his rule, Bulgaria breaks with paganism and joins the Christian community, paying an exorbitant price, a heavy death toll, but there is no other way. The adoption of Christianity in 864 was a historical event of great significance. It guaranteed Boris I much need peace with the Eastern Roman Empire and allowed him to merge the numerous tribes inhabiting the country into a unified nationality and later to found a state. Boris I introduced the Slav script, thus turning Bulgaria into the cradle of Slav culture.

Knyaz Boris I reached the most important spiritual insight - the country needed a single language and script. It accepts students of Cyril and Methodius, creating Ohrid and Preslav Literary School. What other nations took centuries, for bulgarians takes place only about 20 years after their baptizing - introduced a Slavonic Alphabet.

The Russian Kostya and the Bulgarian Petko work at two different sites of a gas pipeline spanning the whole length of the Soviet Union. Just of a few kilometers and there will be ribbon cutting, awards and bonuses. However, it is a fertile Russian land. The two brigadier friends go around all instances, they ask and plea. For "rebelling activities", the brigadiers are criticized. A new inquiry is submitted to Moscow. The reply is slow. Then the workers decide to change the terrain on their responsibility. The last welding is complete. The managers come, so does decision for a change in the design.

Sashko and Tanya are two lovers who want to go on a holiday at the seaside. In order to earn money, Sasho starts working in a brigade digging a well in the yard of Chief Krumov's villa. The workers accidentally discover the remains of human skeletons, a tin ring and several buttons, most likely belonging to participants in the September Uprising of 1923. To avoid complications, everyone decides to keep quiet. However, Sashko decides to break his silence and tell the truth, for which he pays with his life.