Harry and Margo Bannon's happy retirement in a quiet country town is upended when Harry discovers a letter revealing that Margo had an affair early in their marriage. Without discussion, he files for divorce and summons their three grown children home, igniting old resentments, fresh turmoil and local gossip. As a DNA test threatens to shatter everything they thought they knew, the Bannons are forced to confront what truly makes a family: blood, loyalty, or a lifetime of messy, enduring love.