It's a short B mystery. Wealthy William V. Mong calls together his relatives to tell them that they're despicable and he's writing a new will. Before he can sign it, he collapses and dies. Detective Regis Toomey comes in to question them. While he is doing so, reporter June Clyde comes in, sasses him, and assists him in his investigation.
If you're looking for a script with plenty of reed herrings and everyone a likely-looking suspect, this is a decent B movie for you. If you're looking for a decent mystery, in which the audience has all the clues before the murderer is announced, it fails. There's one key piece of evidence that is withheld until the murderer is caught.
It's co-directed by Sennett veterans Hampton Del Ruth and Phil Whitman; Del Ruth took a co-writing credit. The comedic larks are limited to Miss Clyde, who enters the crime scene by by claiming to be the widow of the murdered man, and by annoying Toomey by behaving like a naughty child. There's also 'Snowflake' Toones doing his cowardly bit. Other than that, it's one of those mysteries that could be a decent radio play ... except for the withheld clue.
Cameraman Leon Shamroy gets a few grace notes, with a camera that pans a bit and a couple of point-of-view shots. They may have satisfied him, but they don't add much.