Ensign O'Toole is a lower ranking officer on the destroyer Appleby. He keeps things lively instigating pranks while avoiding any work and trying to show up his nemesis, Lt. Rex St. John. The regular seaman are his willing accomplices.
Jim and Bo run a driving school with Herbie, a sentient VW Beetle who frequently lands them in comic misadventures. Jim's rival Randy was once engaged to Jim's girlfriend Susan.