Sundown tells the story of Joe, a young man coming to terms with the fact that his grandmother has dementia and can no longer remember him. Having been raised by his grandparents, Joe is faced with a tough moral dilemma; to acknowledge his grandmother's deteriorating state, or continue living in denial and avoiding responsibility. Sundown follows Joe as he battles his own demons, confronts grief, love and loss, and reveals the impacts of dementia on its sufferers and their families.