Fai and Yi are an ordinary couple. When Fai becomes a quadriplegic after an accident, their lives face a drastic change with Yi becoming a full-time caregiver amidst financial difficulties. Yi eventually resorts to prostitution to make ends meet. Every time a customer comes, Yi hides Fai in the kitchen and have sex with the stranger in the living room. The couple’s dynamic changes as Yi vents her anger by abusing her husband, while Fai finds new meaning of existence through the pain and a macabre way to fulfill his duty as a husband. Alternating between desire and emotion, the couple floats in the river of desire, struggling to survive.