It's a Friday in New Orleans, ten days before Mardi Gras. As Carnival season begins, eerie events unfold, coinciding with the first downtown parades. These inexplicable occurrences, termed "Harbingers," mystify locals. In a Bourbon Street strip club, a mysterious figure in a cloak adorned with ancient symbols disappears in a puff of smoke. Simultaneously, during the parade on St. Charles Avenue, an unannounced float labeled "Krewe of Moros"...