On Chicago's Weed St., Tony Marino was the hero of the girls who lived in the tenement block with Maria and her family, the Roses. Maria thought she loved Tony and believed he had the bright hopes of a better life which she cherished. For Maria her violin study was to open the doors to a scholarship and wider horizons than those her family had known after emigrating from Poland. When Tony proved a bad influence on her younger brother, Peter, using him as innocent dupe for the stolen goods of the Black Diamond gang of hoodlums, she knew she had been mistaken and turned to Nicky, a student and musician she met through participation in a youth orchestra. The values here are sound and the problems concern many metropolitan teen-agers.