Harold Bledsoe, a botany student, is called back home to San Francisco, where his late father had been police chief, to help investigate a crime wave in Chinatown.Harold Bledsoe, a botany student, is called back home to San Francisco, where his late father had been police chief, to help investigate a crime wave in Chinatown.Harold Bledsoe, a botany student, is called back home to San Francisco, where his late father had been police chief, to help investigate a crime wave in Chinatown.