David and Hilda both rush to Frida’s house.
She called them since she has a problem that needs to be solved.
Her usually so neat bedroom is suddenly a huge mess.
Hilda suspects a poltergeist is at work here.
This scares Frida, since she’s running for class president and can’t use a ghost around.
Since she’s both Frida’s campaign manager and friend, Hilda promises to investigate the matter.
David suggests getting his dad’s old video camera to monitor Frida’s room.
The plan: clean the room, then see if the ghost returns next night.
So the friends get to work with cleaning…
…and Hilda do most of the work.
While Frida only rearranges some figurines.
But then Frida discovers her favorite book is gone; the legend of Great King Condon.
Hilda is sure it will turn up.
She and David set up the camera.
Now all they can do is wait.
The following day, Frida’s room is a mess again.
But as they watch the footage, it turns out Frida herself made the mess.
Frida admits. But also states that her room always used to clean itself.
Hilda and David make her realize that’s not how rooms usually work.
When David mocks her, he and Frida get in a fight. Hilda breaks them up.
Hilda is still determined to solve the mystery.
She still thinks there was a ghost, but one that cleans up rooms. Evidently, he stopped coming for some reason.
David assures Frida you get used to a messy room.
But Frida is quite nervous that she’s not as organized and neat as she thought.
And it begins to affect her life; she continues her campaign…
…but has trouble answering questions regarding her campaign program.
She also messes up her charts.
And accidently handed in the wrong homework.
She plans to drop out of the election.
Hilda tries to cheer her up, but Frida isn’t convinced.
Which means there’s only one thing they can do; get the ghost back.
So the kids go to the library once again.
The Librarian thinks they want to get rid of a ghost, but Hilda corrects her.
When asked by the libraria, Frida admits the ghost took one of her books.
She realizes the book must have belonged to this ghost; it was once property of a certain Craigie Williams.
The Librarian immediately gives them the location of his grave…
…but denies having memorized the layout of the graveyard, and quickly checks the city records.
She warns Hilda about the dangers of summoning a ghost.
But since Hilda insists, the librarian gives her the tools she needs.
That night, Hilda sneaks out of her house to visit the graveyard…
…after some encouring words from Alfur. As well as a reminder she shouldn’t make promises without a contract and disclaimers.
The three friends enter the graveyard.
There’s even a tide mouse there!
David tells Frida she should accept she’s not perfect, which leads to another struggle.
Which ends when they find Craigie’s grave.
While David reluctantly rolls the engraved stick over the grave.
Craigie awakens, and immediately recognizes Frida.
He admits that every night, he visited Frida’s house to read his favorite book.
And since Frida loved the book as much as he did, he cleaned her room for her.
But then the book went missing, and Craigie thus stopped coming.
He doesn’t have the book, but suspects his sister Engilbjort stole it.
Craigie wakes up Engilbjort, and the two get into a heated argument.
She indeed took a book, and if Frida wants it back, she will have to wrestle Engilbjort for it.
More ghosts leave their graves to watch the fight.
The kids wrestle Engilbjort to the ground
But she uses her ghost powers to escape them.
The referee is not amused however. That’s a warning for cheating!
Ghosts do say “boo” when they are displeased.
The fight continues. Engilbjort makes short work of David…
Frida and Hilda give it all they got.
Frida demonstrates why she earned the wrestling badge.
But Engilbjort is too heavy, and Frida’s out too.
Two down, one more to go.
Now it’s just Hilda vs Engilbjort.
Nope; Engilbjort cheats again, and Hilda’s out too.
But Hilda won’t give up, and blocks Engilbjort from entering her grave.
And with the sun coming up, Engilbjort has no choice but to return the book.
Unfortunately, it’s not The Legend of Great King Condon.
Engilbjort swears she took no other books, and returns to her grave.
Frida tries to persuade Craigie to clean her room, book or no book.
But Craigie reminds her he’s not her maid, and refuses.
The three kids return home empty handed.
Hilda first takes a bath.
Despite Alfur’s encouraging words, she feels she failed Frida.
But Frida doesn’t show up for her speech.
Hilda and David find her at her house.
Hilda tries to encourage her once more, but in her anger and depression Frida lashes out at both of her friends.
Now Hilda is finally fed up with Frida’s attitude.
David feels sorry for Hilda after Frida's mean comment towards Hilda...
and get's angry at her too for the harsh and unfair words towards Hilda and him.
After some arguing, Frida and David leave.
When David remarks Frida should learn to clean her own room, she throws a shoe at them.
So much for their friendship.
Then the real thief of the book reveals himself, but Frida fails to notice him.