Lei Li (Jiang David), a young man in white who is famous for his unique skills of "Mandarin ducks", was framed by Long Yizhi (Gu Feng). After he quit the world with his right arm, he hid his identity as a clerk in a small restaurant and lived a life of insulting and bullying.Bajiao (Li Jing), the daughter of the neighbor blacksmith, loved him and often encouraged him to reshape his image, but Lei Li could not defeat the inner demon.After being destined to meet the handsome young man Feng Junjie (Di Long), Lei Li regained his confidence in life and said that after Feng Junjie went to Long Yizhi's appointment, the two of them went to live a retirement life together.Unfortunately, like Lei Li many years ago, Feng Junjie was also caught up in Long Yizhi's trick. He fought hard and died because he was unable to defeat his opponent. Lei Li was very sad when he learned the news and was determined to use his left arm to practice good skills to avenge his good brothers.