When the strange death of three employees of the same bank from cobra venom startles the police, they start remembering a similar case that had occurred in Shanghai eight years before - and they think that the only one who can identify the killer named Jan Van Horn that had escaped before the trial back then is Charlie Chan, because it was him who'd caught him. But Charlie, once called in for help, explains that the convict had been burnt badly in an accident and his face has probably changed completely; and besides that, he'd always insisted that he'd been framed...
But one thing becomes clear pretty soon: there IS something going on in connection with the bank, where a large and immensely valuable amount of radium is stored; and, strange as it sounds, there also seems to be something wrong with the laundry next door, and the coffee shop across the street - and its jukebox...! And when Charlie, Tommy and Birmingham finally find out that there's a secret passage to the bank leading through the underground sewers, they get into a REALLY tight spot there...
This 'Charlie Chan' movie definitely has got a BIG 'touch' of Noir, from dark, rainy streets to a ruthless gang of killers to a genuine 'tough guy' private eye (well, he finally turns out not to be so tough after all...) - only the gags that Tommy and Birmingham, and even Charlie himself, deliver, lighten up the otherwise really 'black' and pretty suspenseful atmosphere. But after all the perils are overcome, and the RIGHT guys have been convicted, we get to see an ending that CERTAINLY is one of the funniest of ALL 'Charlie Chan' films!
