The Greers grew up as a 3-woman unit. This mother-daughter team was nicknamed 'The Greer Girls.' When Marilyn is diagnosed with dementia at age 58, her daughters refocused their lives to care for her during her most precious years. As Marilyn's disease progresses, the girls struggle to care for a woman who is less and less like their mother. Together, they navigate the unknown while balancing their personal lives until they are forced to make a heartbreaking decision.