In the 1966 action-adventure thriller "Assault on a Queen", a daring heist unfolds aboard the British ocean liner RMS Queen Mary as a group of adventurers refloat a WWII German submarine and plan to pull off a million-dollar robbery. With the help of Eric Lauffnauer, a war hero turned mastermind, they use the submarine's torpedoes to bluff their way onto the ship, threatening its captain with a torpedo attack unless they gain access to the safe. As the heist unfolds, greed and desperation take over, leading to a tense showdown between the thieves and the authorities on the high seas.