Morwood, a high school official, has organized a smuggling ring. His confederates are forced to toss a drug shipment overboard as the Coast Guard is ready to close in. Morwood's group knows the approximate position but can't make a move because Five-O and the authorities have the heat on. But when Morwood spots a mini-submarine he gets the idea the the vessel could snatch the drugs out from under the nose of the police.
—Bill Koenig