Canadian actress and filmmaker Sarah Polley investigates certain secrets related to her mother, interviewing a group of family members and friends whose reliability varies depending of their implication in the events, which are remembered in different ways; so a trail of questions remains to be answered, because memory is always changing and the discovery of truth often depends on who is telling the tale.

In Stories We Tell, Sarah Polley plays with the documentary format to explore the nature of memory and storytelling, crafting a thoughtful, compelling narrative that unfolds like a mystery.