This rather basic feature sees Sidney Toler's "Charlie" with son "Tommy" (Benson Fong) and chauffeur "Birmingham Brown" (Mantan Moreland) investigating the murder of three folks working at a bank. What makes it more curious is that these people have been done away with using cobra venom - and this reminds our sleuth of a previous case he solved in Shanghai some years earlier. That perpetrator, thover mais...