In those days, the lives of detectives were highly valued and highly paid. Many people are competing to get into an agency called "C&D Agency". However, not a few people who have joined in it were forcibly dismissed. The story begins with an invitation received by detectives to a remote island. The invited detectives are a collection of detectives who find it challenging to find work after being dismissed from the "C&D Agency". There is only one word when the detectives are no longer members of the "C&D Agency": desperation. They were invited with the prize of restoration of good name and money of 7 million dollars. Due to the urgency of the situation, all those who were invited came to the invitation event. No one ever knows what game will happen in the invitation challenge. Will Samuel attend the invitation? Who invited them? Was there any hidden meaning in the invitation?

A group of strangers kidnaped Nana Xu. When Nana Xu opens her eyes, she realizes that the mastermind of her abduction is the man she has loved the most in her entire life. Cunningly, the man kills Nana and immediately takes her heart to save the life of the woman Suzy Xu. Nana Xu feels very hurt, and she remembers that she only served one man, Jonathan Lee, all her life. The only man Nana Xu loved. When Nana Xu opened her eyes, she did not expect that she had now occupied the body of a woman who was having her wedding. She was wearing a red cheongsam and was in the room. A commotion was happening around her; everyone was panicking and trying to wake her up, even though some had said she had died. After Nana Xu realizes that she was given a chance to come back to life, she discovers that the body she currently occupies is the Wang family's third daughter; she immediately remembers what just happened to her. She is determined to take revenge on Jonathan Lee, who killed her. The Wang family's third daughter, Sierra Wang, is notoriously haughty even though she was the child outside of Mr. Wang's marriage and her deceased mother. Sierra Wang is soon married to the Lee family's fourth son, Andy Lee. Does Sierra Wang get her revenge on Jonathan Lee? Does Andy Lee know his wife's secret and help her, or will Instead Unite with Jonathan Lee silence 'Nana Xu' again?