Rui, a senior high school history teacher in modern-day China, carries the memories of his past life as Emperor Lián Huang. Once a ruler tormented by war and the loss of his beloved empress, he is now reincarnated. When he discovers that his empress has been reborn as his student, he struggles with forbidden love. Unable to express his feelings, he subtly weaves the tale of Emperor Lián Huang and his empress into his lessons, hoping to awaken her memories of their fated love.