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.

Retired C.I.A. agent Frank Moses reunites his unlikely team of elite operatives for a global quest to track down a missing portable nuclear device.