In R City, Country Z of Southeast Asia, a young man named Yuan Bu (played by Zhang Haoran) who suffers from amnesia is rescued by Wu Ting (played by Su Qian'an), who runs a flower shop, and her younger brother Liu Liu. The three rely on each other for survival. Despite Yuan Bu having many secrets that are difficult for ordinary people to understand, his innocent and cheerful personality is silently accepted by the siblings. Wu Ting's congenital brain disease worsens, and in order to raise money for her treatment, Yuan Bu risks his life by participating in underground boxing matches. However, he is soon found by the evil biologist Fu Yi (played by Guo Zhen), who previously treated him as a 'test subject.' This time, Fu Yi's discovery of Yuan Bu is not a coincidence...
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