Lin Wan, a stand-in singer whose voice resembles that of the late diva, was forced to sign a hidden marriage agreement with Huo Yanci, the president of Huo Group, in order to find out the truth about the "accidental fall and death" of her mother, former Huo's music director Huo Qingci. She broke into a wealthy family wearing the shackles of a "substitute", but she didn't know that this contract was a chess game set by Huo Yanci. He had already noticed that her jade pendant was similar to her mother, and the secrets of the Huo family hidden in the jade pendant.
In order to seize power, Huo Mingyuan, the leader of a side branch of the Huo family, produced a forged DNA report, slandering Lin Wan and Huo Yanci as "close relatives" in an attempt to separate them with ethical shackles; the popular actress Su Tang, jealous of Lin Wan's talent and Huo Yanci's favor, repeatedly set up stage traps, kidnappings and other deadly conspiracies.
In the life-and-death games, Lin Wan discovered that her mother was actually an orphan adopted by the Huo family, and the rumors of blood relationship were unfounded. The burn scar on Huo Yanci's left hand was actually the mark left when he rescued her ten years ago. When the jade pendant merged into one, the mother's corruption account book hidden in the Huo family's old house was exposed, revealing the shocking shady story of the misappropriation of 10 billion charity funds.
From contractual marriage to sincere delivery, from stand-in singer to original singer, Lin Wan and Huo Yanci teamed up to tear up the conspiracy and bring the murderer to justice. When the jade pendant finally lit up in the daughter's hand, reflecting her mother's blessing, they finally understood that all "substitutes" and "contracts" were fateful foreshadowings towards true love.
