After spending an accidental one night with Hasung, the CEO who's allergic to females, Yujin, a foster daughter of the Kang family, is put in danger of being abandoned for tarnishing her family's name. Hasung saves her at the right moment and ties the knot with her right away. When Yujin's wounded heart was healed during her happy marriage, the Kang family shows up for a belated apology.