Matsuda the sports reporter, who has been relegated to writing about scandals, encounters a mystery girl who takes down a thief with a judo move in public and tries to track her (Yawara) down. Kamoda, the photographer partner of Matsuda, was only able to take a photograph of a faceless girl in white panties throwing the thief. After Jigoro (Yawara's grandfather) finds out that Yawara has a crush on the school idol, Nishikimori, he spreads rumors about Nishikimori to a gang of school ruffians, leading them to track him down for a beat-down...