Three girls climbed onto the observation deck of an unfinished skyscraper to celebrate a bachelorette party. The only things that spoil the party are the bride's worries about choosing her future husband and the elevator that stops working. Anna and her friends are trapped, the emergency staircase is not finished, and they can't call the Ministry of Emergency Situations, since illegal entry into the building threatens to lead to a showdown with the police.

The friend finds a telephone number for the repair service and calls the elevator operator (Lekha) for help. Having fixed the problem, Lekha goes up to the stuck people. Following the instructions, he successfully gets the two girlfriends down, but as soon as it is the bride's turn, the elevator stops working again. Anna calls the groom, counting on his help, but he is scared and accuses her of cheating.

The wind picks up, it gets colder. Lyokha opens the elevator doors, makes a safety rope from improvised means. Anna and Lyokha go down the elevator shaft, hoping to find a saving ladder on the lower floors. Frightened Anna claws at Lyokha's ear, he screams in pain. She begs him to turn on the flashlight, but some bolt jumps out from under Anna's feet and flies down with a roar. Fighting fear and almost falling into the abyss, they get out of the dark hell.

The floor is already glazed, there is no staircase. In an attempt to catch their breath and warm up, they finish the rest of the wine. Lyokha carefully covers the frozen Anna with a blanket and kisses her. In the morning at sunrise, Anna's uncle rescues her from the captivity of the ill-fated high-rise. Lyokha watches them go, and in his hands a spark from a lighter goes out and lights up.