Commander Matt Donovan, the skipper of the newly commissioned atomic submarine "Shark" whose ruthless obsession for perfection leads him to expect his men to perform with the same cold precision as the incredible nuclear machine. Donovan has no patience with human frailty and he relentlessly drives his crew to be like himself. Donovan's two young officers Lt. Bill Meade and Lt. Joe Crane are assigned to be the dedicated men working for Donovan. Meade stands in awe of the "Iron Skipper" and dreams of commanding his own sub. Crane, a brilliant engineering officer is ...