Ronnie is a wild kid who doesn't follow the rules. His father asks him to learn martial arts from his former comrades after his death. At the train station, Ronnie meets the carefree girl next door, Xiya. Lago, the son of a martial arts master, also falls in love with Xiya dancing in the rain. On one hand, Lago bribes Xiya's father with money, and on the other hand, Ronnie and Xiya make a promise to each other. Can Ronnie learn martial arts successfully? What dramatic changes will this love triangle have?