"Slim Callaghan" (Michael Rennie) is a PI with an habit of solving crimes using such unconventional methods as to annoy the police almost as much as he does the criminals. When a young woman drugs his Scotch at a night club, just as a would-be client tries to call him; then that same gent shakes off his mortal coil very shortly afterwards, his interest is well and truly piqued. Despite the protestver mais...