影片中的单亲妈妈安秀妍。本来在江北生活非常的简单朴素，但是丈夫突发车祸也改变了一生的命运。从丈夫去世以后，年轻的安秀妍就承担起了抚养两个孩子的责任，儿子豆豆身患绝症，需要一笔钱来救治，而女儿安然的性格非常的叛逆，在秀妍因为生活所迫的时候，因为一个能力被卷入了有钱有地位的秦松平的情感生活当中，而单亲妈妈为了完成女儿的学业和给儿子治病的情况，就答应了和秦松平合同夫妻的条件，但事实并没有像安秀妍想的如此简单。

安秀妍本来想在三年婚约结束以后拿着一笔费用来补贴家用，但是安秀妍在秦家的日子并不好过，因为秦家婆婆对安秀妍的身份十分抵触，想要把她赶走，于是就百般刁难安秀妍，在之后安秀妍实在受不了这种生活，就独自一人又回到了曾经生活的地方。

The heroine of the story "Single Mother" has two children, the son is terminally ill, and the daughter is in a rebellious period, but their family is happy and simple However, the peaceful life was suddenly broken. The heroine's husband suddenly died in a car accident, and all the burden of life fell on the heroine overnight. Her son's illness was in urgent need of medical expenses. When she had nothing to do, The male protagonist came into her life. The hero is rich and handsome, and he and the heroine have reached an agreement of husband and wife. The hero's grandmother and mother make things difficult for the new daughter-in-law. At the same time, the female singer, who has always been concerned about the hero's wealth, sees this mediocre opponent. I was also jealous and framed her all the time. The heroine has been enduring it. She wanted to survive the three years stipulated in the contract and leave as soon as possible. At home, after seeing the poor heroine, the ex-wife of the hero decided to help her out of the predicament