Li Xuan is a fast-travel mission agent who once completed missions by playing roles in multiple worlds, then walked away after succeeding. As a result, male leads such as Shen Ji and Xiao Yu became deeply obsessed with her, bringing their respective worldlines to the brink of collapse. Recalled by the system, she returns to various times and spaces to make up for past regrets. Through repeated reunions and emotional struggles, she resolves misunderstandings, heals one another, and uses sincere love to overcome the barriers of the past, restoring every world to a happy ending and discovering the true meaning of love.