There are 'dogs' that target Koreans while they're on vacation abroad. Hyeong-sin and Ji-hoon 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 killed, chase after them,Like dogs that never let go once they bite. Doo-jin, who is abandoned by Hyeong-sin'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... 賢辛一幫人在首爾殺害了很多人，而跑去國外還是死性難改，他們每天尋找目標來消遣，他們本性殘暴惡劣無情，並且綁架後殺害這些人的時候沒有一滴的同情心。這個時候孝槿的兒子去國外度假後下落不明，她找幫派人尋找兒子的下落，結果找到兒子後竟然碰到的一批人是…
