Sisters Qiutian and Qiuye lost their parents in a car accident and have relied on each other since childhood. To make ends meet, Qiutian takes on multiple jobs. Qiuye repeatedly borrows money to try to marry into a wealthy family. To delay repaying her debts, Qiuye sets up her sister to drug her, intending to send her to her creditor, Gao Daming. Unexpectedly, Qiutian ends up spending a night with wealthy businessman Cold Junshan. Qiuye, pretending to be her sister, successfully moves into Cold's house, while the unaware Qiutian applies to become Cold's bodyguard. The two develop feelings, but Qiuye plots with Gao Daming to harm Qiutian. Cold Junshan accidentally learns the truth. In the end, Qiuye and Gao Daming receive their deserved punishment, and Cold Junshan marries Qiutian.
