Let the good times roll! It’s Spring Break, and ex-CIA agent Merry Wrath decides to take her precocious scout troop to a small town in Louisiana for Mardi Gras. Who Dat, LA is Who's There, Iowa’s sister city, so naturally the whole town turns out to greet them with carriage rides, a swamp tour, and a cake party. Unfortunately for them, someone isn’t happy they’re in town… Bring the big guns—we’ll have some fun on the bayou! Strange stories of a local half-gator/half-man, a weird ritual at a voodoo queen’s grave, and a tea room filled with taxidermy make Who Dat seem like it’s another planet, but Merry’s gut tells her there’s something unnervingly familiar about this town. Southern hospitality gives way to suspicion when two people are murdered and Merry was the last to see them alive. Is the killer really a vampire, like the police believe? What is their Bed and Breakfast host hiding in the locked third floor? How is Merry going to explain to the girls that they can’t name the pelican that follows them around Deep Throat? Merry doesn’t have any answers, but when someone close to her is arrested, and a dangerous threat is revealed, she has to find the killer quickly, before Fat Tuesday becomes Fatal Tuesday!