Sisters, or The Balance of Happiness (1979)

Sisters Maria and Anna live together. Maria, a most proficient secretary, encourages Anna to finish her studies and start a career; Anna broods, threatens to quit university, takes pills, and keeps a diary. When Maria's relationship with her boss' son Maurice starts to lead to love, Anna takes a selfish, drastic step that plummets Maria into solitude. No longer able to connect with Maurice, Maria manages to establish a relationship with Miriam, a typist at her office who becomes a substitute younger sister, but Maria is intrusive as well as helpful. Can this or any relationship work out for this talented woman whose past seems to choke her soul?