Lim Shinyoon has been living a lie. A strange man is at the family dinner and reveals that Shinyoon is not actually a “Lim” but a “Nam.” This, of course, means that he is not blood-related to any of his sisters…and this man also confesses that he is actually his real father?! And with a dying wish to have Shinyoon give him a grandchild before he leaves this earth?! Well, there are four highly suitable options sitting right there next to Shinyoon... No, these are his sisters! But well, now that he’s a brother from another…everything could change!