Wei Anning, the head of a modern family of traditional martial artists, unexpectedly travels back in time and becomes the true daughter of Duke Anguo’s household—a girl maliciously swapped at birth and destined to be cannon fodder. Bound to a revenge system, she must avenge the original owner of her body against Wei Rongrong, the impostor who took her place, and everyone else who harmed her. Armed with formidable fighting skills and items from the system, Wei Anning fights back. Unexpectedly, she catches the eye of Crown Prince Chu Chengyuan, who is frail but calculating, and he asks to marry her. Hoping to use his influence to speed up her revenge, she agrees. After their marriage, Chu Chengyuan does everything he can to protect her. Wei Anning ultimately wins justice for the original owner and joins forces with Chu Chengyuan against palace and family conspiracies. As they take down their enemies together, their feelings deepen, and they find healing in each other.