On the planet Mir - the imperial 19th century, the era of armored cars and airships. The fateful year of Confrontation has arrived. Once again the skies are split by the roar of falling dark stars - alien ships filled with cruel warriors, terrible weapons and unprecedented equipment are flying from the red planet to the World. The war brought the Dual Empire to the brink of crisis. The Prince of the Blue Dynasty wants to unite the state; To do this, he needs to seize power and marry the princess of the Red Kingdom. A military coup is near. But then an unusual company intervenes in the storm of politics - a roofer's daughter, a young countess, a gendarmerie ensign, an alien spy and an alien pilot. Circumstances forced them to take an oath to each other, from now on they are a union of loyalty and honor. They are very young, impetuous and in love. Together they are capable of the impossible...