When Soleil accidentally unleashes 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. But the mysterious "ancient evil" they unleashed goes after Missy and influences her into targeting Soleil in a deadly pursuit.

When the Krewe realizes Belial feeds off fear, they watch over the Friday the 13th parade. Soleil realizes they need to work together to defeat The grunches! Missy learns to control her transformation. Maybe finds out the Bunradys are vampires.

They go to the swamp and finds out Pat used to live here until his dad passed away in a gator accident. Pat never believed the story, and a mysterious voice offers to tell him the truth. Mayor Furst and Belial send a creature to eliminate the Krewe.

Furst uses a spell to lead the rougarous and vampires to their deaths. To free themselves and stop the war, the Krewe must convince Nelson that his dad's beliefs are wrong. Soleil must make a choice between good and evil.