There was a moment there where everything was vampires all the time. But Twilight can suck it — bring on the Swedish cult phenomenon Let the Right One In. The 2004 novel of the same name spurred several film adaptations, a TV pilot, and now a stage production. The coming-of-age love story follows teenage outcast Oskar and new girl and shut-in (and “old soul”) Eli as they forge a friendship based on their shared loneliness. Adapted for the stage by Jack Thorn, LTROI makes its Midwestern debut with help from director Brandy Joe Plambeck.