When a female editor working overnight with her careerist cameraman discovers he’s the perpetrator in his acquired murder footage, she must safely evacuate the studio

Title: shutter speed

So a psychopathic cameraman is killing innocent homeless people and documenting them under “mysterious serial killings”

When he learns that she knows his secret (around midpoint??) let’s just say he’s willing to do anything for his bright future…
My question is: what are they doing in the first half of Act II? What do you suggest happens in pages 25 to 55 for a 110 page script? Do they flirt each other before she discovers (while editing) that he’s a sonofab**ch

It doesn’t create a sense of urgency and danger. She’s working night shift with a psychopathic killer which isn’t expressed by her simple goal “to safely evacuate the studio”

thanks for your time