Chloe, an ambitious American horror novelist, is invited to unveil her latest book during the carnival celebration in the North of Argentina. She arrives to Jujuy to experience the nine days celebration among the “devils”, where the real story that inspired her book “Masacre” occurred. But, a violent femicide disrupts the festivities. Chloe finds connections between this murder and the events from ten years ago, so she starts writing what could be a sequel. She feels strange, thoughts of ritualistic pacts, sacrifices to the devil, gruesome murder scenes, invade her mind, her texts, and her dreams. More femicides are perpetrated, and due to her writing, she becomes a suspect for local Police. Isolated in a country so foreign to her own, Chloe finds some protection and distraction in the arms of Martín, the host who has taken her there, but Chloe’s mind and body get worse each day as her new story advances, as if sick. Superstitious inhabitants begin to say that she has “the devil inside her”. Blurred line between creator and creation puts at risk Chloe’s sanity. The veil between reality and the supernatural is thin, there is a way to escape but it may cost her her life, and time ends soon, with the last act of the carnival. Chloe knows, that one way or another, she will be famous.