Because her mother threatened to die, Lin Xia was forced to give up her love affair with the poor boy Gu Shen and left for the United States to inherit the family business. Ten years later, she changed her name to "Su Wan" and returned to China for revenge, but got into Gu Shen's taxi on a rainy night. Gu Shen became a driver because of his family's bankruptcy. He mistakenly believed that Lin Xia abandoned him for money and deliberately concealed his identity. Lin Xia revealed the truth about being imprisoned by her family and forced to get engaged through "unanswered phone calls". Gu Shen learned in silence that she almost committed suicide to protect the two of them over the years. When Lin Xia asked, "Can we go back to the past?", Gu Shen suddenly parked the car under the sycamore tree where he fell in love - in the trunk were hidden love letters he had written every day for ten years, and his true identity was actually the illegitimate son who was expelled from the Gu family and the Lin Xia family's biggest business rival...