Kim, a Taekwondo champion decides to give up his fighting career for good in order to take care of his daughter Sa Rang. But when an evil gambling kingpin kidnaps Sa Rang, Kim must agree to fight in a rigged boxing match in exchange for Sa Rang's freedom.

Soon after getting a new phone, a woman notices strange things starting to happen. When she investigates, she discovers that everyone who has had her phone number before her has died suddenly and mysteriously.