On a quest to solve her mother's mysterious disappearance, half-human Xiao Wan steps onto a time-travelling train and takes up the arduous task of helping people out with problems regarding their fate. She weaves her way through cities rich with history, crossing paths with the likes of a quick-witted, courageous Roman general and a reckless, possessive Babylonian king. Yet dilemma after dilemma of romance seems to come her way...

It is said that the fruits of labor from one's present life were yieded from seeds planted in one's past life. The train can only keep moving if the seeds of the past are sowed with purpose, and rid of tragedy. As the train approaches its final destination, will Xiao Wan be able to solve the final mystery?