Three months after saving the magical world, the sisters and Harry still can't get near one another. All magical beings on Earth are experiencing the same problem.
Harry obtains a moon poppy, which purifies magical blood. Macy believes it can help them.
Maggie is a student at Seattle State College and Mel is teaching a class -- The Intersectionality of Inequality: Class, Race, and Gender.
Maggie can't get near Jordan, either, because he is cursed by magic.
Maggie wants a research internship with Dr. Lawrence, a psych professor, but he writes her off.
When the sisters combined the Source and the tree, it sent a pulse through their bodies and left behind trace elements in their blood.
The energy they're emitting is sending off a signal, and Macy believes that accounts for their allergy.
Macy makes a potion using the moon poppy to fix it, but it doesn't work.
Mel becomes possessed by something and starts digging up a grave. She doesn't remember in the morning.
Maggie has a panic attack in class.
The same thing that possessed Mel possesses Maggie.
Macy performs the Revelation Spell to find out what's behind their allergy problem, and it leads Harry to find a stone tablet with symbols.
A possessed Maggie empties a bag of bones in the Command Center. She wakes up late the next day with no memory of the previous night.
Macy gets possessed at Safe Space.
Mel and Maggie have been having the same dreams of them digging in a cemetery and bringing bags of bones to the Command Center.
They can't find Macy, so Harry orbs to the Command Center. There, Macy is performing a body restoration ritual from the Book of Elders.
Mel and Maggie arrive and find Macy passed out and Harry gone.
Using their energy signal, they track down the thing that possessed them. They find Harry wounded.
Macy uses the moon poppy to heal him.
They find and kill the thing that possessed them. It leaves a symbol behind where its body was. The same symbol is on the tablet Harry found.
Harry guesses that the symbols are ten thousand years old, which is why they can't find a cure. Whatever infected them is older than human civilization.
A creature emerges in the woods.