In the near future, a time of artificial intelligence: 86-year-old Marjorie a jumble of disparate, fading memories has a handsome new companion that looks exactly like her deceased husband Walter. This is a Prime, a holographic simulation programmed by Marjorie's daughter and her husband Jon to feed the story of her life back to her. But as their interactions develop it becomes clear that each of them has a very complex relationship with their shared histories, with each other, and with this new technology they've invited into their home...