Cheng Nianying was ordered to assassinate Qin Yurong, but she found the bride looked exactly like herself. The Madam of the Marquis's Mansion claimed she was their long-lost daughter and begged her to marry in her sister's stead. Cheng Nianying agreed, seeking to escape the assassin organization and gain family affection. After marrying into the prince's mansion and falling into danger, the usually frail Fu Yi unexpectedly held a sword against the mastermind's neck and fiercely declared that she could only be his.
