Gyllenhaal is Joe Baylor, a cop with anger management issues, answering 911 calls. Joe is not the guy you want to answer your call if you are in distress, because besides being angry for reasons that will be disclosed along way, he's also going through a bad divorce, can't see his daughter and is mean to everybody.
The first act works quite smoothly, with Joe answering calls in an open space environment and some colleagues around. Then he gets a call from a woman named Emily who claims she's been kidnapped and for unknown reasons Joe decides Emily's for real, despite her sounding weird on the phone.
The downfall starts in the second act, when Joe moves into a separate office and every other presence is cut off. We learn that Joe is in trouble for having killed someone and his partner is ready to lie to save him. In the meantime, Emily and her estranged husband take turns talking to Joe, who discovers that things are not quite as they seem. Gyllenhaal overacts wildly, alternating grimaces and sad expressions, shouting and stammering on the phone.
The third act is a sort of bad joke. The happy ending of some sort of the Emily situation sends Joe rushing to the toilets, where everything is sparkling clean. You could perform surgery in those toilets so sterile and sanitised they look. Joe is so emotionally incontinent that he vomits in a shiny cubicle and then decides to sit on the floor without flushing, to make a couple of phone calls enjoying the smell of his puke.
It's impossible to understand why Joe has a change of heart and decides to tell the truth and nothing but the truth at his hearing. He phone to tell his partner to also be sincere, while going through more grimaces and long, poignant silences.
One star is compulsory and I give the other to whomever cleaned those toilets. I wish I could hire them to clean my home.