Sailor Sam and crew have gone undercover to catch some smugglers. The once sleek Porpoise looks like an old fishing yawl. What kind of smugglers is Sailor Sam up against--those who traffic in people! Mr. Baker and his Indian employee have just figured it out that Sam Stone is on their trail, and It is beginning to look as though there will be a sea battle before it is all over. You won't want to miss the exciting conclusion to this story.