What a good thriller first needs is to be a good film. The next challenge is to get the unintentional comic relief out of the way. The cinematic nuances come in about 3-4 strata later. Apartment, clearly, is not the place to delve into a comprehensive analysis of film-making.
"Inspired" by Single White Female 2, the plot isn't too much to speak of. Preeti (Tanushree Dutta) is an airhostess who moves into a 2BHK in Mumbai with her boyfriend Karan (Rohit Roy). She dumps him, suspecting him of two-timing her - based on outrageous premises - and looks for a new roommate.