I won't get into the details of the cobweb of the script smartly written by Parvez Sheikh and Pradhyuman Singh Mall (a lot of which, sadly, is given away by the trailer), but the first half of the film has moments that are a serious test of patience. It takes a while before the actual plot kicks in and even once the unending series of blackmail calls begins, it's not always consistent until intermission. Post-intermission however, the chaos is intensified which results in humor that could leave you in splits, the major chunk of which is delivered by Arunodhay Singh, Divya Dutta and the witty dialogue.
Talking about performances, Irrfan Khan is in good form, though here he appears a little uninspired and holds himself back from giving us another winning performance and rising above the films shortcomings. The other supporting cast comprising Kirti Kulhari, Pradhyuman Singh, newcomer Anuja Sathe get some moments to shine and showcase their active participation in this land of absurdity. The real star of Blackmail, hands down, is Arunodhay Singh. Skillfully combining physical humor with a colorful palette of expressions, Singh makes the most of the meaty part that never lets predictability completely take over the film.
I'm going with 3/5 for Blackmail. Director Abhinay Deo falls short of delivering another Delhi Belly. The film has many strengths, but consistency is definitely not one of them. Still worth a watch!