Jerry (D'Artagnan) and Nibbles (Aramis) are two mouseketeers who decide to help themselves to a lavish banquet, which Tom has been servant as a captain (Captain Rochefort) and ordered to his master Sir Girard, Tom will be king with his life; failure to do so, and he will be executed. Jerry and Nibbles enter the castle hall through a stained glass window, through a suit of armor, and by parachuting down to the table. They unsuspectingly catch Tom's attention by showering him with champagne.
Later, Nibbles is helping himself to some of the food while singing Alouette to himself, when Tom emerges behind him and pokes him with his sword. The little mouse yells angrily. Before Nibbles can get away, Tom impales the little mouse's cape with his rapier. Jerry manages to stab Tom in the rear-end and rescue Nibbles. Jerry puts custard in Tom's face launching a swashbuckling fencing display against Tom, ending in Tom catching Jerry. Nibbles launches an axe toward Tom and it slices off half of Tom's back, and Nibbles hides in some fruit. Nibbles runs away and falls into a drink - but Jerry saves him by hurling a tomato at Tom, as well as multiple vegetables which Tom impales on his rapier; heating them up and eats them like a shishkebab. Nibbles walks out of the drink, drunk, and pokes Tom in the bottom. Tom screams in pain and jumps up. Nibbles waves his sword while saying, "Touche, pussy cat!" but as he runs away Tom catches him. Jerry makes the save by hitting Tom on the head with a gada so much that Tom falls through the table, which leads into Tom and Jerry having a sword fight. While this goes on, Nibbles brings along a cannon and stuffs it with everything that is on the banquet table. He lights the cannon,and it explodes violently, Tom was fired.
As the smoke disappears, Jerry and Nibbles are walking triumphantly down the street with stolen banquet food. Suddenly, in an unusual morbid ending, they see a guillotine blade coming down, strongly suggesting that Tom was executed. Both mice gulp, and Nibbles sighs, "Pauvre, pauvre, pussycat", (Poor, poor pussycat) and shrugs: "C'est la guerre." (That's war.) Then the two Mouseketeers contine their victorious marching off into the distance, they has been a knight of shining armor.