The story of Anthony, a mischievous 80 year old, living defiantly alone and rejecting the carers that his daughter, Anne (Olivia Colman), insists he needs. Adamant that he doesn't need help, Anthony's grip on reality is unraveling. Or is he being gaslit by those closest to him. As the viewer experiences the ebb and flow of his memory, the film blends genuine fear with overwhelming sadness, and asks the question 'What is it like to grieve for a person who is still alive'.