To Qiu Shui, a young lad in his most hungry, curious, and restless 20s, the whole world feels a little erotic. Studying at China's top medical college, he can break down men's carnal impulses with solid human anatomy knowledge but can't grasp the inner desire that draws him to three disparate romantic interests-the fairy-like hometown first love, the marriageable college girlfriend, and the sensuous working woman.