Ju-on: The Grudge

It is said that when a person dies with a deep and burning grudge, a curse is born. When an average housewife in Nerima, Japan, was murdered in a grisly fashion, it gave rise to a curse so powerful that it threatens to kill at a pace thought unimaginable before.

The curse manifests on those who encounter the curse by any means, such as entering the house or being in contact with somebody who was already cursed.