顾今蓝是叶家收养了十九年的假千金，被迫代替真千金嫁给一个即将去世的陌生男人，从此对叶家心灰意冷，改姓为顾，决定为自己而活。一次意外中，她走错了房间，本以为与名义上的丈夫宋宥泽共度一夜，却阴差阳错与海城大人物时烨相遇。更令她震惊的是，时烨竟然是自己学生的家长，而他正是五年前与她有过一夜情的男人，他们的孩子时星燃也成为了顾今蓝的学生

Okhee is a lower-class diver in the city. One day, Eunyoung, the daughter of her late husband, comes to visit. What’s more, Kyeongsik, Okhee’s son, who is being chased by creditors, leaves his young son Junseo with them and disappears. Eunyoung wasn’t planning to stay long but misses the chance to leave due to Okhee's accident and the appearance of her step-nephew, Junseo. Eunyoung starts to live together with Okhee, but everything feels uncomfortable. 　　Eunyoung desperately needs money to regain custody of her daughter, and therefore she becomes interested in the dry-cleaning business her father left behind. Eunyoung wants to sell the dry cleaner’s after renovating it, and Okhee distributes flyers to protect the dry cleaner’s, so the two get into conflict. A redevelopment craze sweeps the small village, and the developers attempt to redevelop the surrounding area using Eunyoung, but since she doesn’t easily give in, they begin to threaten her. Old feelings and stories that were put away are mixed into the struggle as they deceive and corner each other.

苏云晚机缘巧合下成了民国大少爷的原配，深知自身处境的她决定先发制人，进行了一系列的自我拯救行动，以求生活平安潇洒。情敌屡次三番陷害，都被她巧妙的化解开来，一系列奇遇最终让她开启了十里洋场风光无限的生活......