The year 1910, before revolution in Russian Empire. The gold miner from Yekaterinburg, Nikolai Kamenev makes the profitable deal with Bulgarian manufacturer Dimitar Yvovich, with the condition of marriage between Dimitar and Kamenev's daughter Lucy. The latest always wanted to marry her childhood friend Alexander Gorinov. Lucy asks her sister Olga for help... The year 2019. Alisa Pryanikova has always wanted to marry her rich friend. But she learns the story of Lucy Kameneva, whose whereabouts are lost in Bulgaria. Now Alisa has to face with an incredible thing.