After their recent adventures in Florida, Gabriel, Sheila, and Orson are due for a vacation. But their dreams of beaches are interrupted by an urgent cry for help.

Sheila's aunt, the witch who first taught her magic, has hidden herself away in snowy Maine. Now she's being targeted by a radical environmental group that's demanding her help... or else. They've mastered an ancient native magic and are going to use it to destroy anyone who gets in their way. And they have a nasty habit of controlling animals... including Orson.

It will take all of Sheila's magic and Gabriel's skills to stop them, and it just might tear them apart before they're through. But if they fail, it could be the darkest night of all.