Amanda (Juliette Binoche) and her stepfather Martin (Tom Courtenay) struggle with a moral issue that divides them. Has Amanda’s mother Leslie (Anna Calder-Marshall) who is suffering from advanced dementia, lost the ability to make critical decisions in her own best interests? And, if so, who is responsible – a spouse, a child, an institution – for making such a determination? As Amanda and Martin are forced to make increasingly difficult choices, the repercussions spiral out of their control.