"Like a spark is like a butterfly" tells the story of Song Yongfang witnessed the home changes, revenge for the trip to Shanghai, in Shanghai and Shanghai gangster Duan Shaorong met her. Duan Shaorong because of years of gang life terribly fatigued heart back, read, want to return to calm and peaceful rural life. Yet Jianghu disputes let him back, had to continue to struggle. Under the Communist Party's inspiration and help, he decided to join the war. The Tang brothers personalities, they by Duan Shaorong around two women Song Yongfang and Duan Ning influenced Duan Shaorong, led Duan Shaorong into the ranks of the people.