Zhè bù diànyǐng jiǎng de shì yīgè làngrén de gùshi.
This film tells the story of a wandering ronin.
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浪人 is borrowed from Japanese 浪人 (rōnin), originally meaning a samurai without a master. In Chinese it can describe any aimless wanderer or, in modern slang, someone between jobs or drifting through life.