To repay his cousin's kindness—who was injured while saving him years ago and to improve both their lives, Xiao Xiong takes on a side job as a human punching bag, serving as a sparring partner for rising boxing star Yao Mo. Unexpectedly, he catches the attention of coach Yao Feng, who, without making it obvious, begins to train Xiao Xiong. From a reckless novice with no foundation, Xiao Xiong is pushed onto the international stage, stepping into the world of competitive boxing.

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