What's the scariest thing that can happen on Halloween? Murder.Ruby Holmes is plenty excited to serve her cakes and goodies to the many trick-or-treaters in Carmel Springs, Maine. Halloween is here. Costumes range from fearsome to the funny, and when Ruby sees a clown jostling with a vampire to get to her cakes, she doesn't think anything of it.That is, until the corpse of the `vampire' washes up on the beach, right in front of her food truck. Ruby's not going to let this mystery go unsolved, even if it means annoying the local detective and the murderer themselves.Can Ruby discover the identity of the killer clown? Or will he get the last laugh?