Sachiko Sasaki (Mitsuki Takahata) works as a literary magazine editor. She is well respected by her colleagues due to her perfectionist ways. On Sachiko Sasaki's wedding day, her boyfriend Shungo disappears. Sachiko Sasaki is dumbfounded by her boyfriend's disappearance. The next day, Sachiko Sasaki goes to work, but she can't stop thinking about Shungo. She realizes she is more traumatized than she thought. Sachiko Sasaki decides to go to a restaurant. When her meal comes out, Sachiko Sasaki forgets all about Shungo. Her experience makes her become a connoisseur of gourmet meals.
2018年元旦，《忘却的幸子》作为SP亮相，一般冬天都比较我都比较有时间，所以第一时间看了这部剧，而且写了感想，这里是连接《美食番名义下的女性成长物语》，当时第一判断就是这部很可能拍成连续剧，没想到2018年秋季档就实现了
