Fang Jianjian and Lu Ze are lovers who met in college and was a romance success story as they married each other. But behind the perfect love is a hidden crisis... In order to save her lover and wake up her beloved fiancé, Fang Jianjian seeks the help of brain specialist Dr. Song, and participates in Dr. Song's brain machine experiment... to enter the world of his brain through technology. Dr. Song designed three time and space memory fragments, allowing Fang's consciousness to re-experience the memories of school, work and family, re-experiencing the things that had hurt Fang and their relationship, as well as allowing Fang to see the details that she had overlooked. In this love adventurous journey, the two have realized the emotions they once ignored as well as completed the redemption of each other. But is this really just a simple story of a princess saving a prince?...

Ah Nian, a young girl from the Ji tribe, encounters Xiao Zisu, a boy from a different tribe, in her hometown of Sushui. They eventually fall in love and as their wedding day approaches, Ah Nian eagerly waits for her lover’s appearance. Instead, she is met with disaster—the destruction of her tribe brought by Zisu’s older brother. This massacre causes the two to lose all memory of each other. Seeking revenge for her people, Ah Nian adopts the alias 'Xiao Man' and infiltrates the General’s manor, pretending to stay by Zisu’s side. The memoryless Xiao Zisu is both suspicious of Xiao Man’s sudden arrival and intrigued by a sense of familiarity, believing she holds the key to regaining his lost memories. As time passes, Xiao Man begins to realize that Zisu is not as cold-hearted as she initially thought. His warmth and barely hidden affection lead her to suspect that someone else might be responsible for the massacre. Through fragmented memories, the two gradually recover their past and work together to fulfill the forgotten promise they once made....