Before New Year, Maria’s quiet, unremarkable life takes a sharp turn. Through “Строймат” (an online construction news feed), a rumor spreads that the company was sold and the new owner wants to meet the team at a masquerade. The conversation multiplies thanks to a strange condition he sets: until midnight, the masks cannot be removed. Maria hides from her coworkers that she has already received an invitation—and with it a box containing an incredibly beautiful masquerade costume. All that’s left is guessing who the sender is and why they picked only her.