Namor substitutes as a speedboat for one of Betty Dean's newspaper friends on a surfboard when suddenly the man's board explodes, killing him. Namor soon realizes that the board has been treated with a chemical which becomes explosive when left in the sun for long periods of time. Namor is on hand when the Sheriff arrests Jed Norris for the murder, but the pleadings of innocence from that man's daughter spurs the Prince to uncover the true crooks, who were running a numbers racket that had been discovered by the newspaperman and for which he was killed.; Cap and Bucky come across the scene of a gang striping a dead man of his clothes, and soon learn that the murdered man is a night watchman at the Woolsey Museum, and that the gang was intending to strip the musuem of its art and jewel collections.; Whizzer is invited to compete in a race with a radium-powered car known as "Meteor III", not knowing that the doctor who initiated the race actually wants to put the Speed King out of the way while he and his partner rob the Drumman Aircraft facility of more radium fuel to power the car.