Because of the death of their parents, Li Si (played by Li Sidani) and her brother (played by Wang Chuanjun) depend on each other for life. The two siblings who lack family education both went astray during the rebellious period. After his brother was imprisoned, Li Si, who had lost his way, went to another city alone to seek a new start. Fan Xing (played by Ke Youlun) has been with beasts since childhood. After his girlfriend died, he was trying to help her realize her life wish. At this time, he met Li Si, who had just come to this city, and took her in. Li Si's image was unruly and uninhibited, and she was not likable, but her desire to apply for a ballet school attracted Fan Xing's great attention. Through observation, he found that Li Si had a firm heart under her seemingly ruffian appearance. Her words and deeds told him that she must have had experiences different from ordinary people before. Li Si took to the streets of a foreign city again with a secret in her heart, and fought again and again with a group of street dance groups controlled by evil forces. In the end, Li Si comforted the spirits of his parents in heaven with his conscience...