圣诞夜惊魂Season 4 will pick up a full year after the events of Season 3, and business couldn’t be better at the Wild/Reid Detective Agency as Harry and Fergus welcome an unexpected client: Charlie Wild.　　Elsewhere, Harry is hired by a friend and former wild child turned nun; Lola stumbles upon a dance school myster; a Dublin literary tour takes a bloody turn; and Fergus’ hopes of going to college at the same time as Lola are threatened when she gets an incredible offer to study abroad.