In order to save his seriously ill mother, Xia Mo signed a contract and became the "fake fiancée" of Lu Hanzhou, the heir to a wealthy family. She thought it was just a transaction, but she was gradually shaken by the examination and living together in a wealthy family. When the contract expired and Bai Yueguang returned, she left with the secret. When they reunited three years later, he looked at the cute baby who looked exactly like him and realized that they had been deeply in love with her for a long time. This love that started as a lie finally found its echo in midsummer.
