Waste Away follows a family as they navigate the effects of a progressive neurological disease. It starts with David and Kate, a young couple confronting David's diagnosis and the difficult realities it brings. Their relationship is strained by fear, anger, and uncertainty as they try to cope. Years later, the story shifts between past and present, showing an older David and Kate reflecting on their experiences. Amidst pain and challenges, they discover moments of peace and acceptance. The film explores themes of love, memory, and strength, ultimately offering a moving look at loss and the lasting connections that remain.