Annie Doyle's husband, Vince, is in a care home with final-stage dementia. And after decades of deeply unhappy marriage, Annie can barely bring herself to care. But as the family gathers to see out Vince's final days, he utters a single word that will change the entire family forever: 'Martha'. Who is Martha? And why is Annie so quick to dismiss the mention of her name? Annie's past is finally about to collide with her present, and there's no one - family member, friend, even her loyal dog, Finn - who won't be shaken to the core by her long-held secrets.