Eddie (Robert Forster) is an aging traveling diamond salesman from the old school of dealers who developed longstanding relationships with their clients and prided themselves in their knowledge of the trade. He is faced with a demotion when the new management of his company deems him too high a risk for carrying their expensive cache of diamonds. His last assignment is to train a rookie salesman, Bobby (Donnie Wahlberg), whose only job experience is in servicing vending machines and whose cocky sales tactics promise to alienate Eddie's hard-won clientele. Needless to say, the relationship between the two men gets off to a less than amiable start. Eventually, though, the two find that each has something valuable to offer the other.

DIAMOND MEN represents an impressive contribution to Daniel Cohen's early directing efforts. The film's quirky plotline and sincere, understated character portrayals are a winning combination. The unlikely match of Wahlberg and Forster creates a wonderfully funny tension that eventually blossoms into endearing friendship.