Rosencrantz (Gary Oldman) and Guildenstern (Tim Roth) ramble obliviously through Elsinore Castle and its environs as the events of William Shakespeare's "Hamlet" unfold around them. While visiting their old friend Hamlet (Iain Glen), the pair engage in an ongoing philosophical debate about free will versus predestination, each trying to prove absurd positions through misbegotten experiments. Meanwhile, the clueless friends attempt to make sense of the peculiar goings-on in the castle.