Su Wanqing, the daughter of a failed family, was forced to marry the ruthless wealthy CEO Gu Tingchen. Behind the marriage, she is just a substitute for Su Wanrou, his beloved first love in Gu Tingchen's heart. However, in this seemingly unequal marriage, Su Wanqing moved Gu Tingchen's cold heart with her gentleness and tenacity, and gradually got rid of the shadow of the "substitute". However, this is not a simple love story. Behind it is the secret of the downfall of the Su family, the whirlpool of the Gu family's power struggle, and a conspiracy buried deep in the heart. The two joined hands in the entanglement of love and hate, faced all the darkness that tried to destroy them, and finally found the happiness that belongs to each other.