How do you spin a nursery rhyme into a full-length musical? In this case, the uber-creepy poem in question is, thankfully, based in reality: the eponymous Lizzie Borden who reputedly “took an axe” and “gave her father forty whacks” was a real life New England girl accused—and acquitted—of murdering both her parents in the late nineteenth century, so there’s more than enough material to mine.