Gay men ‘slam’ (inject) crystal meth at orgies in this hard-hitting documentary exploring London’s ‘chemsex’ scene. With frank contributions from users of meth, GHB and more, it’s a graphic watch that shows how dating apps and social media have fuelled the scene. Taking a non-judgemental approach, the makers gain access to sex parties and explore the attraction and the dangers in interviews with NHS counsellor David Stuart. It’s a fascinating peek into an underground world; Stuart estimates that a newcomer to London’s gay scene will be offered drugs within four online chats.