As mystery stories go this is well above average. The most conspicuous item about London is that, although it is not by the creator of the Chan series, the tempo is so well imitated by scenarist Philip MacDonald it would pass for an original Earl Derr Biggers composition. For Warner Oland the Chan role now is second nature.
Most of the action takes place on luxurious interior sets of a wealthy country home in England. The story takes advantage of the locale to inject a fox hunt, which adds color without being superfluous.
Just who committed the murder is not paid off in any detail until the last reel. While the cast is well chosen its members are so completely subjugated to Chan’s importance that they impress collectively rather than as individual players.