When Dorrit Wegner turned fifty, the government transferred her to a state-of-the-art facility where she can live out her days in comfort. Her apartment is furnished to her tastes, her meals expertly served, and all at the very reasonable non-negotiable price of one cardiopulmonary system. Once an outsider without family, derided by a society bent on productivity, Dorrit finds within The Unit the company of kindred spirits and a dignity conferred by 'use' in medical tests. But when Dorrit also finds love, her peaceful submission is blown apart and she must fight to escape before her 'final donation'.