The setting of the ballet is Riga in the late nineteenth century. The atmosphere of the day is conjured up by the city's ancient streets, Art Nouveau interiors, plant motifs, and effective contrasts: it's winter outside, but inside, flowers are blooming. Christmas-tree decorations and toys come to life, and Maria's dreams begin to come true. Everything happens exactly as befits Christmas Eve, though the tone is set by the rules and forms of classical ballet.