Two psychotic sisters, obsessed by jealously, plot to murder their new stepmother.

Found Columbo! A rumpled detective but apparently a very good one.

Okee-Dokee. You're so right. This can go many, many ways. Will narrow it more. Who is Columbo?

Hmmm. Reminds me of the Columbo episode where the twin psychotic sisters *did* murder their stepmother :) - but that is neither here nor there, stepmothers have always made good targets.

This is an unusual logline in that it's almost too short! Don't see many of those! :) When you have a plot that isn't intrinsically unique, it's nice to get a few details that make it different.

Is this stepmother the "perfectly-nice stepmother" instead of the evil one?

What exactly are they jealous about? Are they used to being the apples of Daddy's eye?

Other than psychotic, is there anything else special about them. Even their age might paint a picture for us. If they were six-years-old or forty-years-old, that would suggest widely-different things about their personalities.

Are they going to make away with her simply, or is it a grand scheme? Or something really out there?

Another thing that's good to know from a logline, especially with a plot like this one, is whether you're presenting a horror or a drama or a comedy? This can go in a lot of different directions.

You don't need ALL of that in there, of course. Just a little something-something to lift it off the page.

Interesting idea!