「明明是『環南四少』？為什麼其中一個是女的？還有，為什麼這四少的照片，永遠只有三個人？」 「其中一個是少奶奶啊！」 「那另一個呢？為什麼照片裡永遠沒有他？」 2022年的台北，已經是一個多元的城市。一座位在台北在淡水河與新店溪沖刷上的三角洲上，有一座擁有55年歷史提供整個首都食材的傳統市場，他們叫它「環南」。有人的地方就有江湖，1991年的「環南市場」當然就有了「環南四少」！有少年的地方就有氣血方剛的純愛，只不過屬於「環南四少」的純愛，跟市場多元的食材一樣，有著如秘密一般的多元情感。唯一的證據，就是那張只有三個人，卻標明「環南四少」的照片。但當年大家都不知道這「三男一女」的環南四少，其中大家以為28歲的第四少，居然來自2022年⋯⋯。
Maca (María Valverde), 30 years old and clumsy by nature, makes the most of life and strives to be happy. Maca's talent is wasted working as an assistant for an oppressive and terrifying fashion influencer and she spends her time with guys with whom she never manages to establish an emotional bond. Together with Jimena (Elísabet Casanovas) and Adriana (Susana Abaitúa), her two unique and lovable friends who are always ready to do whatever it takes to make their problems not seem so bad, Maca has managed to make Madrid a city where everything is possible. Everything seems to be going well until he-who-must-not-be-named comes back into her life. Leo (Alex González), the love and biggest mistake of her life, the man who tore her heart apart, obliterated her self-esteem and her faith in men, comes back into her life to turn everything upside down. Maca has tried to forget him, but now she has to accept that he has returned and face the emotions she has locked away to deal with the unforgettable memory of what could have been and never was. Old wounds are reopened and Maca will have to be brave and confront her conflicts, fears and insecurities in order to finally take control of her life.
