A highly organised criminal gang is running rampant in London. The police turn to Bulldog Drummond (Walter Pidgeon) for help. He goes missing from his club (for a rather complicated reason which easily goes wrong) and goes undercover as a criminal.
Drummond and policewoman Helen Smith (Margaret Leighton) join the gang led by Arthur Gunns (Robert Beatty), but the identity of the mastermind behind the gang is still a mystery...
An enjoyable film, taking a look at the sleazy underbelly of early postwar London. The story is good with a number of interesting scenes and sub-plots. Not quite as fast paced as some earlier Bulldog Drummond films but this goes give the film room to breathe.
