Mischievous and lovable Lin Wan lost her dearest friend, Jiang Feng, because of her childhood antics. Her young heart couldn't bear such grief, so her whole family left the hometown where she had grown up. Keeping a promise she made to Jiang Feng, she quietly looked after his only sister, Jiang Mi. But she never expected to meet the love of her life, Li Qin: a pure-hearted young man devoted to one woman, a man who would remain faithful until death. Li Qin willingly helped Lin Wan care for Jiang Mi, never imagining that Jiang Mi would fall in love with him. On one side was the debt she owed, and on the other, the love of her life. Lin Wan, what should she do...?