When a mutant gene causing Alzheimer's is discovered in the Jennings family, it leads scientists on a journey to develop a cure and leaves family members with a terrible dilemma. The Jennings are the first family in the world to be diagnosed with hereditary, early onset Alzheimer's, a discovery which many think will be the key to finally unlocking a cure. But that discovery also revealed a devastating truth for the family: the hereditary gene is being passed through each generation.