There is a murder in a somewhat notable setting, a group of somewhat interesting suspects, there are Inspector Alleyn and the inevitable Fox of Scotland Yard. Eventually it turns out that one of the suspects is guilty, and is arrested and will presumably be tried, and likely convicted.

Nothing (and I suppose this is a spoiler, if only a negative one) especially mysterious or puzzling happens, there are no particular surprises or twists, and as a result one comes away with rather a neutral feeling about the whole thing.

Still, there are much worse ways that one could have spent the time.