It all started with football. Deok-hoon falls in love with In-ah who shares his love and passion for the sports. They quickly become lovers and he proposes. She refuses at first but they are eventually happily married. Marriage is like a dream until one day In-ah declares her wish to marry another man. She doesn’t want divorce as she loves Deok-hoon all the same, only change is that she loves the new man as much. Leaving Deok-hoon who finds himself unable to leave In-ah in the middle, she goes ahead and marries her new man. And so the bizarre bigamy begins.
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.