After a nine-month estrangement, sisters Lily and Rose, are reunited in a hospital emergency room when the younger sister's husband has been badly injured in a car crash. While waiting for updates, they reminisce about their childhood memories in an effort to unearth the family tragedy - the death of their older sister Tansy. Lily and Rose begin to unravel the lies of omission that pulled them even farther apart. Lies I Told My Sister is an exploration of how our community of loved ones can both buoy us up or tear us down. How innocently kept secrets can cause profound chasms.