Masha Prozorov is the middle sister, about 21 years old at the beginning of the play. When she was 18, she married her teacher with whom she was madly infatuated. She thought her teacher, called Kulygin, was the most intelligent man in the village; however, her love and passion for Kuygin has since faded and she is now extremely unhappy in her marriage. During the play, she falls in love with Vershinin, a Lieutenant-Colonel who commands the local artillery battery.
Will the seductive Masha stay in her marriage or run off with Vershinin?