In a bustling Connecticut town, Walter Mitty sits in the driver's seat of his car, lost in a gripping daydream. In this imagined world, he's a fearless pilot of a U.S. Navy flying boat, facing a fierce storm. His crew looks to him for guidance as they navigate a storm, relying on Mitty's skills and bravery. However, this intense scenario is abruptly interrupted when Mrs. Mitty scolds Walter for spacing out and driving too fast. The Mittys proceed on their mundane errands in town. Mrs. Mitty disembarks to visit a hair salon, instructing Walter to buy overshoes and wait for her. Left to his own devices, Walter's imagination takes flight again. This time, he envisions himself as a brilliant surgeon, performing a rare procedure. The imaginary operating room is filled with other doctors who admire Mitty's expertise. But this fantasy is punctured when a parking-lot attendant interrupts Walter's reverie to take the car keys and park the car himself. The world of the renowned surgeon fades, leaving Walter feeling belittled by the young, confident attendant. After this brief encounter, Mitty walks to a nearby store to buy puppy biscuits. On his way, he's ensnared by another daydream. Now, he's a sharpshooter facing a courtroom trial for murder. Just as he's about to showcase his unparalleled shooting skills as a defense, a woman's voice disrupts his thoughts. She laughs at him, pulling him back to reality, and he realizes he's been muttering the courtroom drama aloud. Feeling embarrassed, Walter continues his errands. But his humdrum tasks can't tether his lively imagination. As he waits for his wife outside the hotel, he imagines himself as a British pilot, bravely sacrificing himself for his country during World War I. This scene, too, dissolves when Mrs. Mitty arrives, berating Walter for forgetting the overshoes she'd asked him to buy. After their tasks in town are complete, the Mittys drive towards their home. Walter's daydreams come to life one final time. In this imagined world, he's bravely facing a firing squad, unflinching and unafraid.