This documentary can’t help but be moving as it follows the Cam On group in Kolkata, who are creating a drama based on their experiences – even if it could do with more depthCam On is a film-making collective comprising some of the estimated 500 sex workers and their children who live in Boro Goli, the red light district in Kalighat, a desperately poor area on the southern edge of Kolkata. “The street holds many stories,” says Rabin, the son of a Nepalese woman who was sold by her uncle into sex...