There are 'dogs' that target Koreans while they're on vacation abroad. Hyeong Shin and Ji Hun kidnap and kill these people without a drop of guilt. While they are in Korea for a period of time, the family of the people kill chase after them like dogs that never let go once they bite. Doo Jin, who is abandoned by Hyeong Shin's gang, kidnap a new victim alone. A middle-aged woman tracks down Hyeong Jin's gang to find her son who went missing during his vacation. However, the victim and kidnapper are tangled in many complicated ways.