Shin-ae who grew up as a housekeeper's daughter receives an enormous amount of fortune through marriage. Mi-na who grew up plentifully as a wealthy daughter ignores Shin-ae due to an unconscious inferiority complex.

Shin-ae who was fired for arguing with the customer decides to re-apply for universities, but her parents only tell her to yield the opportunity for her brother instead. Meanwhile, Mi-na's relationship with Jeong-min becomes deeper.

Shin-ae overwhelmed by her sacking reaches for Jeong-min's help but is disappointed by his rational opinion. To make the bad situation worse, she finds out about Mi-na's relationship with her crush Jeong-min.

Shin-ae puts all her effort into university application preparation but finds it difficult to concentrate. Meanwhile, Mi-na realizes a change in Jeong-min's behavior and suspects Shin-ae to be the cause.

After meeting with Seon-ju, Jeong-min re-thinks his relationship with Mi-na who is bothered by the change. Meanwhile, Shin-ae finds Seon-ju with her mom who was trying to borrow money for their family.

Shin-ae's family loses the savings that they've been gathering for years. Due to this, Shin-ae decides to give up her university application and her stay at Mina's place. Meanwhile, Jeong-min loses his job because of Mina.