CIA agent Marvin uses defector Shaw as bait to lure Soviet agent and biological warfare genius Schell aboard their train traveling through Europe. Hoping to eliminate the dangerous Schell, Marvin's plans are interrupted by a thundering river of snow. Top-notch tough guys Marvin and Shaw
do the best they can in this poorly handled espionage tale. Shaw, an often neglected and underrated talent, died before the film's soundtrack was completed.