Isa is a poor student who was hospitalized due to her mother's illness and her stepfather's alcoholism and gambling, and has been sucking blood from Isa. In order to raise funds for her mother's medical expenses, Isa was forced to fall into the "foster" contract of Jack, a partner at a top Manhattan law firm. She thought it was a transaction to give up her dignity, but during the process of getting along, Isa noticed Jack's care and attention for her. The two developed feelings for each other, and with Jack's help, they finally turned the tables and achieved a new chapter in their lives.
