Four stepbrothers are having a hard time getting along as a family. 15 years after their parents’ second wedding, the four unexpectedly head home and reunite by an urgent call from their youngest stepsister, born between the remarried parents. Although their rivalry escalates, the four brothers come to a momentary truce to put their hearts together and find their missing parents.

Two teenagers joining the same class in a high school die on the same day. The one to be top of the class is killed by a big knife on the street, the other – the second best of the class indeed – seems to be jumped from the top of the school building. Everybody believes that he first killed his classmate and than himself. But when the police finds small pill boxes into the stomachs of both kids confessing their murder two South Korean cops are torn into a new case of murder series. While they try to hunt down the serial killer, more pupils are getting killed…