St. Petersburg. Friends Lera, Valya, and Olya perform a mystical ritual for fun, and suddenly Catherine the Great herself materializes in the kitchen amidst the candles. The crowned empress quickly embraces the 21st century: she tries cappuccino, searches for the "Kareta" fare on a taxi app, and that night, she discovers a dance floor with a bang. The friends are delighted, until they notice that reality around them is beginning to shift.