The talented driver Su was a legendary racing driver who won the F1 world championship for seven consecutive years in his previous life. After accidentally traveling through time, he became an underappreciated maintenance man in the club. He was dismissed and humiliated due to the dislike of Jade-786 and the suppression of the club's top executive Zhang Kai. In the scrapyard, Su Nian rescued the abandoned machine girl XC-99 known as the "murder racing car" and named her "Xingchen". Xingchen possesses terrifying straight-line explosive power, but is judged to be a failure by everyone due to its extremely poor turning ability.
