Planetoid 127

Young Tim Lensman visits his old science teacher, Prof. Colson, who's grown wealthy by speculating on the stock market in a way that suggests hidden sources of information. Tim overhears a puzzling radio message, and Colson shows him some peculiar equipment in a room labeled "Planetoid 127." Before he can explain further, a rival investor determined to find out Colson's secrets interferes, with devastating results.