Young man Ning Nu disguises himself as a woman and sneaks into the mansion to seek revenge. However, after several coincidences with Ji Yiran, the fiancée of his enemy's youngest son, he develops an inexplicable relationship. In the face of a great revenge, the personal relationship between the children was finally put aside. When the great revenge was avenged and everything was revealed, Ji was still unable to face everything and committed suicide. Fortunately, he was saved by Ning Nu. When he woke up, he had forgotten all the past and even his personality was completely different. Can Ning Nu and Ji Yiran start over? After learning all the truth, can the two let go of the past and welcome a new future together?