Yoko doesn't show up for work so exchange student nurse Karen is sent to take care of an American family living in a house in Tokyo. She discovers the haunting spirits of the Grudge and investigates the ghosts and their reasons for haunting.
Almost every single one of the American characters has maybe a third of the personality of the ghosts that haunt them, so you begin to think the grudge itself is less a curse than a perfectly reasonable eviction strategy.