The quality of violence in the Montreal underworld is a revelation. Dark
alleys, over severs ever yawning for bodies of the slain, are traversed
and analyzed by Mr. Michael Brent, the brilliant Montreal attorney who
is defending a man accused of two murders. The case is
dead-open-and-shut in the minds of the police, who are certain of
conviction but Brent, the attorney, suddenly comes to the conclusion
that the prisoner had nothing whatever to do with the infamous crimes.
Brent's investigations lead him directly to the scene of a third murder
after which his assorted and violent experiences are capped with this
one which is here repeated for a reason soon to be explained! Walking
along in the dreariest section of Montreal's slums, Brent is accosted by
a little man whom he has seen before but can't recall. The man acts
suspiciously, seeking to strike up a conversation and clearly indicates
that he knows the trend of the lawyer's investigations at the house
"Number Ninety".