The second young lady of the Ye family was sent away to grow up at a country estate. Her father didn't care for her, and her concubine-born stepmother didn't love her. She was also a hopeless romantic, infatuated with Prince Jing and willing to bang her head against a stone lion for him.
That headbutt killed Second Miss Ye. When she woke again, her soul had been replaced by Ye Xinyun, a woman from the 21st century who had transmigrated after an accident while delivering food for her best friend. A love-struck System ordered Ye Xinyun to become Prince Jing's devoted admirer, but she refused to play along. She wasn't about to be a lovesick fool: those who love too hard end up with nothing.
When Ye Xinyun refused to chase Prince Jing, the System used its items to force her. She fought back and accidentally discovered that getting close to Yan Lingxiao could free her from the System's control. To escape it, she climbed walls and crawled through dog holes, all to win the favor of Yan Lingxiao's grandfather, a powerful man she could rely on. She succeeded, but Yan Lingxiao set his sights on her too, doing everything he could to bring her home as his wife.
Once Ye Xinyun stopped running after Prince Jing, he finally realized he'd fallen for her. He attacked his rival Yan Lingxiao and tried to take Ye Xinyun back from him.
After Ye Xinyun broke free of the love-struck System, her lost memories returned, and she uncovered the mystery of her birth. When she was little, Concubine Liu had maliciously switched her with another child. She was actually the legitimate eldest daughter born to the late Madam of the Prime Minister's household.
A smiling-fox male lead + a petty female lead + a System + a doting husband