A strange couple move in next door to an inventor and his wife and invite them for a visit one evening. There the strange man tells them he himself is an inventor and shows the neighbour a solar powered engine that could power a small city, right there in his basement. After seeing the math and plans for it, the strange man offers to give the entire thing to his neighbour. In disbelief he tells his boss of the plans and the two speculate on the impact this will have on the world economy. The boss says not to worry, that the oil companies will buy it out and suppress the technology so things will remain the same. Who is this brilliant inventor, what does he have to gain by giving away the technology?