Each of us is connected to rivers in our everyday lives. Most of the six million people living in the Potomac River watershed do not realize that their drinking water comes from the Potomac. Since the Clean Water Act passed in 1972, the health of the river has improved. However, it is still in trouble and faces a number of serious threats: urban development, population growth and runoff from farms, pharmaceuticals and chemicals. The film follows the flow of the Potomac water from its origin, into our homes and businesses and back into the river. We become aware of the need to protect this essential resource and of how our wellbeing and that of future generations is intertwined with the health of the Potomac.