Gu Shiyu, the second youngest son of the Gu family, is a playboy and has a notorious reputation. He is the most troublesome person in the family. In order to tie up this wild horse, the Gu family decided to marry the Jiang family. The original marriage partner she was interested in was Jiang Wan, the eldest daughter of the Jiang family, but she had her heart set on Gu Shi'an, the eldest son of Gu. In the end, the unknown illegitimate daughter Jiang Yun was pushed to the forefront and became the substitute bride. An engagement that no one expected, two souls that were not valued. He thought she belonged to someone else, and she thought he hated her. In the midst of temptation and alienation, who will glimpse the truth first, and who will surrender first?