It's a Polish film. There's dubbing in English, so that saves you from reading subtitles all the time.
A bored housewife gets a juicy murder to solve right in her neighborhood.
By pluck and determination she slowly gets towards the truth.
There's a spread of suspects to choose from. The inspector is her classmate. He's a bungling sort of chap who can't say no to her meddling in an official investigation.
The movie is totally child safe. It says 13+, but I would show it to a 6 yr old.
Don't expect an Agatha Christie level mystery. This is more gentle medium pace rather than hostile fast bowling 😊.
But its charming. The location - small town Poland, the characters, are all likeable.