He clashes with Mack Miller ( Glen Corbett ) , a cocky champion , and falls for Mary Reeves ( Beverly Tyler ) , another top skater .
A traveling roller - skating team takes an interest in Johnny after he shows some aptitude .
Johnny clashes with Mack Miller ( Glen Corbett ) , a cocky champion , and falls for Mary Reeves ( Beverly Tyler ) , another top skater .
A traveling roller - skating team takes an interest in Johnny after he shows some aptitude .