The couple Jun-young and Mi-yeon promised to marry. However, since the relationship was formed by strategy, one corner of the heart is empty. Jun-young still has a heart for Eun-jung, an old lover and now her father’s secretary and lover, and Mi-yeon is actually attracted to a man who is much older than her. One day when the four people gathered together, Mi-yeon was attracted to Joon-young’s caring father, Jae-beom, to seduce him…