Roshan's script

Cast

Police finds body of a Miju on the railway tracks
They think the murderer is left handed based on the angle or whatever
They enquire about the victims close friends and relatives
Roshan is introduced and informed as their friend. He's a writer.
He tells Dhanya, his girlfriend that the way he was murdered looks v similar to what he's written in a story.
The police also suspects Roshan.
Paul also gets murdered
--Need to figure out plot in between--
Tino is about to get murdered. Dhanya is somehow on the scene confessing how she's been the killer all along.
Tino says something eerily prophetic, something along the lines of "Do what you have to do"
Dhanya gets arrested.
Flashback scene to Roshan and the boys hanging out. Roshan's alter somehow comes out and scares his friends.
Flashback scene to Roshan and the boys hanging out. Roshan's alter somehow comes out and scares his friends.
His friends suspect something is wrong with him. His alter also wants to protect his identity from coming out and distressing Roshan His alter also wants to protect his identity from coming out and distressing Roshan.
--something about Roshan's alter priming Dhanya to do these murders. Not sure if Dhanya is the murderer or if it's Roshan's alter---