The plot description at IMDb is wrong: it's not about a man who gets caught up in a string of killings. There's only one attempt at killing by DENNIS O'KEEFE--and that's all.
The ingredients are here for much more suspense than is actually generated. Trouble is the script is too long-winded before it gets to the point. The result is a flat effect, too much exposition before the plot gets down to serious business.
In the meantime, ANTON DIFFRING does a commendable job of playing a very polished, very assured contract killer who hopes, as a reward, to get ownership of one of the most valuable stamps in the world. It's an offer he can't resist. Seems that DENNIS O'KEEFE is intent on finding someone to kill his niece in an act of revenge after her sudden suicide death which can be traced to the "Mr. X" who must be destroyed.
The plot twist is a good one, but it takes too long to get to that point and by that time a viewer is apt to lose interest in the slow-paced story.
Summing up: Could have been scripted a lot tighter for more suspense.