If the knife blow seven years ago was the first separation between them, then the knife blow now is her second heartbreak. A check of 100 million, a humiliating word, and no looking back. She left. Many years later, she returned again, thinking she had given up, but his appearance disrupted all her thoughts. The two doors that the man had kept locked were finally opened completely when she left, but it was too late. She returned the knife she owed him to him, leaving the words "I've returned this knife to you, I don't owe you anymore."
"Su Mu, do you know that the knife you stabbed is deeper and more painful than it was seven years ago? Do you think you left me only the scar from seven years ago? What you hurt is not this, but my heart."