In the summer of 2001, Lin Feng, who was covered in wounds, was stranded on the shore beside the Chao Phraya River in Bangkok. He was found by Alai, a construction worker who went to work early in the morning. Alai and his co-workers took Lin Feng back to the construction site out of sympathy. After waking up, Lin Feng found that he could not clench his fists due to his injuries, and his memory was completely lost. He also found that Lin Feng spoke Chinese and could not communicate with Alai. Alai had to send him to the police station. However, the police station was short-staffed. After taking the case, he persuaded Alai to go back and wait for news. The police station could not take in an adult homeless man. Alai had no choice but to abandon Lin Feng. Lin Feng was homeless and identified Alai. Alai had to take Lin Feng back to the construction site and planned to give him a job within his ability. Who knew that although Lin Feng had problems with his fists, he was loved by everyone on the construction site because of his good physique and hard work. Everyone became curious about Lin Feng's muscles, and Lin Feng had a happy time. One day, he happened to run into the rogue Bank. Bank's boss wanted to contract the land, so he always troubled the construction site to stop the construction. However, Alai wanted to use this land to build a welfare home as a safe haven for homeless people. The conflict of interest turned into a physical conflict. Alai and his co-workers were weak and could only swallow their anger for a long time, and then work overtime after Bank showed off his power. However, this time when Bank was showing off his power, he ran into Lin Feng. Although Lin Feng could not communicate with him, he saw the difficulties of Alai and his co-workers. In order to repay his kindness, he wanted to stop Bank, but he angered Bank and fought with Lin Feng. Although Lin Feng's fists were useless, his muscle memory helped him use fighting to beat Bank. Lin Feng suddenly became the patron saint of the construction site, and Lin Feng began to doubt what had happened to him. Alai was afraid that Lin Feng would be retaliated against, so he had no choice but to drive Lin Feng away. Lin Feng was stranded on the street, but he met Xiaoshui, the owner of a Chinese fruit shop. Xiaoshui gave Lin Feng a meal out of kindness and found that he spoke Chinese, so he wanted to help him, so he took Lin Feng to the hospital. Under the doctor's advice, Lin Feng realized that he was once a boxer and fell into confusion. Bank, who was beaten into a pig head, came to the underground boxing ring to find the boss Chachai. Chachai loved gambling and there were many boxers around him. Chachai, who originally only wanted land, was very excited when he learned that there were masters on the construction site. He took the boxers to find trouble with Lin Feng. Chachai, who couldn't find Lin Feng, kidnapped Alai's daughter for revenge and forced Lin Feng to appear. Alai had no choice but to find Lin Feng with great difficulty. When Lin Feng learned that Chachai had taken Alai's daughter away, Lin Feng went to the underground boxing ring without saying a word, determined to help Alai get justice. Unexpectedly, when the people in the underground boxing ring saw Lin Feng, they were all scared out of their wits. Chachai was also shocked and ordered all the boxers to take Lin Feng as their enemy. Unexpectedly, Lin Feng was assisted by God and beat all opponents with elbows and knees. Chachai saw that the momentum was not good and hurriedly ran away. Finally, Lin Feng learned from Chachai's men that he was a well-known Chinese boxer. He was invited to Bangkok to participate in the boxing championship. Because Chachai hoped that Lin Feng would fight a fake boxing in the competition, Lin Feng refused. Chachai was worried that his boxer would lose to Lin Feng, so he secretly arranged for someone to deal with Lin Feng. Unexpectedly, the men who arranged did not want to bear the charge of murder and released Lin Feng in the river. After Lin Feng knew the truth, he recovered his memory and decided to return to China. Alai and Xiaoshui were very reluctant to do so, but Lin Feng decided to return to China as soon as possible. However, Chachai held a grudge and found Narong, an unscrupulous boxing champion who was also hiding in the city. Narong was once a great underground boxing champion, but because he listened to Chachai's slander, he joined a black boxing team. As a result, his career was overshadowed by his exposure. For this reason, he could only hide and practice fighting skills, looking forward to returning to the boxing ring one day. Just as Lin Feng said goodbye to Alai and his co-workers, Chachai led many boxers to decide to take over the entire construction site. Under the encouragement of Lin Feng, the migrant workers fought against the thugs. At the end, the Thai police arrived and arrested Chachai. Na Rong wanted to fight Lin Feng, so he grabbed Xiao Shui and fled to the waste factory. Lin Feng chased him all the way and finally fought a decisive battle with Na Rong. Na Rong, who was defeated by Lin Feng, finally used weapons at all costs and gained the upper hand. When Lin Feng, who was covered with wounds, was in danger, he remembered the Chinese martial arts he had practiced in his childhood. The moves taught by his master were vivid in his mind. He changed his moves in times of crisis and defeated Na Rong with Chinese Kung Fu that Na Rong had never seen before, which made Na Rong finally lose with a sense of conviction and opened his heart. After everything calmed down, Lin Feng and Xiao Shui made an appointment to meet again and left Bangkok. Many years later, they returned to Bangkok to participate in the competition. Lin Feng eventually brought Chinese martial arts to the local area and established a martial arts association, which improved local public security. While developing his career, Lin Feng and Xiao Shui successfully combined and invited Fei Lai to attend the wedding and witness their marriage.