Rachel marries top cardiac surgeon Kenneth for five years. When his first love Hayleigh comes back, Rachel is diagnosed with fatal heart failure. She keeps a diary recording all the hurt Kenneth brings her by favoring Hayleigh. Hayleigh deliberately delays emergency blood supply during Rachel’s surgery, leading to her death. After reading Rachel’s diary, Kenneth loses his mind, kills Hayleigh and commits suicide. His soul meets a cold, unforgiving Rachel. Reborn to their first meeting day, Rachel turns down Kenneth's kindness and chooses to let him go for good.
