Based on the Navy?s real-life experiment with a steam engine in a WWII submarine chaser, the film follows the misadventures of the ill-prepared crew of a ship on trial runs. Led by a captain (Cooper) who is as inexperienced as his officers ? they don?t call them the ?90-day wonders? for nothing! ? they sail out to sea on an unforgettable journey. They?ll either sink or swim?but they?ll make history either way!