After experiencing the disintegration of their parents marriage, Claudine and Janine Beaulieus lives are further complicated when their mother Odette remarries to an Anglophone and they are forced to turn English. Now, years later, Claudine has made a career out of documentary filmmaking, focusing on the painful lives of other women; Janine, a wife and mother, questions her feelings for her sisters boyfriend; and Odette succumbs to her Valium and rum addiction in a luxury retirement villa in Jamaica. Shifting from Duplessiss Montreal of the fifties to Toronto in the eighties, Voice-Over chronicles the lives of a mother and daughters struggling to find their voice in a bilingual country.