Mu-ok is the self-made owner of the established restaurant 'Pyongmanok' that has been drawing long lines of customers before social media existed. He is deeply troubled by his only son, Moon-seok, whom he hoped would inherit the family legacy, becoming a monk, leaving him with no one to carry on the family name. While Mu-ok is devastated by the thought that his family line would end with him, young kids come to his restaurant claiming Moon-seok as their father! Mu-ok, now given a chance to continue his family's legacy, enjoys happiness like never before. Meanwhile, Moon-seok revisits his life before becoming a monk—and stumbles upon a shocking revelation…