Nine intertwined stories examine the complexities of the one emotion that connects us all: love. Among the characters explored are David (Hugh Grant), the handsome newly elected British prime minister who falls for a young junior staffer (Martine McCutcheon), Sarah (Laura Linney), a graphic designer whose devotion to her mentally ill brother complicates her love life, and Harry (Alan Rickman), a married man tempted by his attractive new secretary.

New York City policeman John McClane (Bruce Willis) is visiting his estranged wife (Bonnie Bedelia) and two daughters on Christmas Eve. He joins her at a holiday party in the headquarters of the Japanese-owned business she works for. But the festivities are interrupted by a group of terrorists who take over the exclusive high-rise, and everyone in it. Very soon McClane realizes that there's no one to save the hostages -- but him.