Jung Joon-gyo

Choo Sang-woo is the epitome of an inflexible and strict rule-abiding person. Jang Jae-young is like a semantic error in the perfect world of Choo Sang-woo. Will Sang-woo be able to work with Jae-young as an artist and engineer?

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 kill 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...

Chu Sang U, a strict computer science student, clashes with design major Jang Jae Yeong after removing his name from a project, leading to unexpected sparks.