The ‘Severance’ star goes darker than usual in this tale of haunted hotels, Irish folklore, and a missing woman Everyone’s got their demons. Writers, admittedly, tend to have more than most, and writers in movies? Forget about it. They’re a virtual seventh circle of hell. Hokum gives you a taste of one tormented scribe’s fiction before introducing you to the man behind the keyboard. A conquistador wanders a barren desert. A child, face covered in dirt, trudges behind him. There’s a map, leading to treasure (we assume), stuck in a bottle. The only way to get it out, apparently, is to break the bottle open, but on what? The lost soul focuses on the only thing hard enough to shatter glass: The boy’s skull. Yeah, it’s, um, bleak. The preamble is a feint — spoiler: this is not a movie about conquistadors — but it does serve to set up the troubled mindset of the “hero” of filmmaker Damian McCarthy’s uniquely creepy story of things that go bump in the psyche.…