It’s certainly more than just an average murder mystery; amateur detective "Philo Vance" (played by William Powell), along with his Scottish terrier, becomes involved in looking into the puzzling death of a rich man who seems to have taken his own life while alone in his study. However, the medical examiner suggests that things might not be as straightforward as they initially appear, and when the deceased’s brother turns up dead as well, it creates an engaging puzzle. The story includes several unexpected developments, with many individuals appearing potentially guilty, and Eugene Pallette ("Detective Heath") contributes to the film's lively feel as a police officer reminiscent of a character like ("Lestrade"). While the resolution feels somewhat forced, it remains an enjoyable experience overall.

Source on TMDB