When Soleil accidentally releases an ancient evil from a cursed graveyard, the spirit of Marie Laveau grants her, and an unlikely group of kids, powers from the Loa.
Reeling from their new powers, the kids seek answers from Pat's Aunt Alma, a voodoo mambo, who helps them contact the spirits; the mysterious ancient evil they unleashed goes after Missy.
Soleil and Stanley learn there's more to each other as they desperately try to save his little sister Cece from rougarou Missy; Pat and Maybe search for offerings to summon Ogoun.
When the Krewe goes on a field trip to the swamp, they find out Pat used to live there until his dad passed away in a gator accident; Pat never believed the story, and a mysterious voice offers to tell him the truth.
After learning from Honey Lou the Swamp Monster that the Feu Follet trapped the soul of Pat's dad at the Court of Light, the Krewe helps Pat say one last goodbye.
The Krewe has an opportunity to sneak into Furst Mansion and find proof that Furst is the one working with Belial; their cover is almost blown when it turns out Furst is hosting a meeting with the rougarous and vampires.
The Krewe gets caught, just as Furst and Belial planned; after facing Belial for the first time, Soleil experiences true horror and her spirit is broken.
To free themselves from the attic and stop the epic war at the amusement park, the Krewe must convince Nelson that his dad's beliefs are wrong; Soleil must make a choice between good and evil, but her decision racks her with guilt.
