Twin sister detectives – who moonlight as vigilante serial killers – get framed for murder by their criminology teacher, who they (now) must outwit to clear their names.

Starting with the protags and not burying the lead: Twin sister detectives - who moonlight as vigilante serial killers - get framed for murder by their criminology teacher, who they (now) must outwit to clear their names. I don't know - sounds like a faulty parallelism?

Yes it MUST have SIN CITY FEEL. it's about TWIN CITY meets SIN CITY. Furthermore, as I explained earlier, the twins are not evil by nature, it's not in their genes. They only kill to do justice. But they still kill (although one of the twins is not really in to it=see drawing of father working in the dog meat factory and the girls watching) a lot, therefore being serial killer. If I would make them totally evil the audience would not 'root' for them anymore. It's what Tarantino does with making his protags likable and not likable at the same time, play with this feeling, that makes the audience feel unconvertible and keeps them focused.

That's it for now. I go and take a look at your comments again this evening, midday for you guys in Amerika (?), and for now let the info sink in. You both are far 'out thinking' (if that's a word) me in terms of sentence contruction, but hey, that's why I'm here, hopefully learning on this forum

Maybe, but I begin the logline with their mentor -The criminology teacher- framing them and instead of 'struggling' to clear their names, In my attempt the must 'outwit' their mentor. I end with them being pro-active instead of having events happen to them.