Remedy Ocala, Liz Amberly, Chloe Weaver, and Lilith Pluto receive a creepy letter one day. Like, "someone has a stalker" type of creepy. Not sure where it was from, to whom it was for, or why it was sent; they form their own theories regarding its origins. But when they each set out to prove themselves right, none of them were truly ready for was the bottomless void of witchcraft, cryptids, and conspiracies they had accidentally pushed themselves into.