I am a bit loathe to criticize a young actor, but ... I know me some acting, and good for her she got job and paycheck, but Ms Thirlby does not command her part or hold up the film as lead. And together with the otherwise in several ways failed realization of a being a good modern 'noir', this movie is a failed use of budget or much of your attention. Even though the script and directing are not tops, all the other actors do their parts well. And yes, as others have stated, Ms Beals shines as always. I wonder if this is an example of using the advantage of blinded male control. Ms Thirlby openly states her bi-sexuality, and is very relaxed and natural in that onscreen. Did that unduly gain her the lead? Otherwise I can see her 'thinking' and visibly 'controlling' her acting, be a 'small' presence on screen, and not commanding as the lead detective/character. And together with her acting, hair and makeup, Ms Thirlby, contrary to the needs of plot and film, is an unconvincing blonde 'beauty' (she is a lovely person and figure in her own self). I was fascinated not because it was good.
Review of White Orchid
