MGM specialized in upper-class motifs. Here it's newly-weds Lord and Lady Wimsey moving into a baronial mansion in rural England only to find that the previous owner has taken up final residence in the cellar. So, Wimsey being an amateur sleuth and she being a crime writer, the Lord and Lady's honeymoon must be postponed, despite their pledges to leave detecting to the police.
The film's generally too long such that the tepid script gets stretched beyond plot capacity. As others point out, the mystery doesn't get going til the last 20-minutes. The production does manage some local color, especially the lady who dabbles in exotic jams. That reluctant tasting scene is really well done, showing the Lord and Lady's comedic potential. Too bad there's so little follow-up. Also, there's the handyman who cannonades his gun up a chimney flue, perhaps the movie's high point as the soot comes raining down on the shooter.
But a key problem is the talented Montgomery who, for whatever reason, lacks flair here for a William Powell type role. As Wimsey, he stirs up neither much interest, nor amusement. Maybe, if the script had given him a quirky habit, that might have helped. But, I guess his role is an adaptation of a literary figure, so he may have felt constrained. Nonetheless, between his uninspired turn and a limp narrative, there's not much left to recommend. All in all, the movie's a really minor entry in the Gentleman Sleuth Sweepstakes. Too bad.
