Cam is a uniquely thrilling film not just because it sits comfortably inside the genre and delivers at almost every turn, but also because it's a film about sex work that feels interesting, authentic, and most importantly authentic. That realism comes begins with Daniel Goldhaber's tight direction--which tends to be pretty neutral until they want to ramp up the paranoia, which is done to startling effect--but it mostly stems from writer Isa Mazzei, an ex-cam girl herself. Madeline Brewer takes on the role of Lola, a young woman whose ascending career as a cam girl takes on a horrific edge when she wakes up to discover her channel has been taken on by an impostor who looks scarily like her.