A contract relationship begins between the stupid cute Lin Lu and the childish Shi Liansen. In order to pay for her younger brother's insurmountable medical bills, Lin Lu (Song Yiren) gets into a contract relationship with Shi Liansen (Jerry Yan), the young and domineering CEO of a company. Unknowingly, the binding contract paves the way for something more as Lin Lu repeatedly tests Liansen's limits and a romance ensues.