“It’s a terrible thing to be frightened by something you can’t see!”
#1. So let me get this straight. Gerard is a ghost, and he’s evil, and he’s in charge of young David, who’s being intermittently possessed by another ghost named Tad. Gerard has left a note in an old book that tells a crew of dead pirates to wait for somebody to wave a green flag three times in the window of the tower room of a mansion that Gerard is haunting. David reads the note and decides that Gerard wants him to wave the flag, which will magically raise this circle of criminals and misfits from the dead, to do Gerard’s dark bidding.
Then David goes upstairs to the tower room, and finds that there really is a green flag there which nobody has noticed for the last hundred and thirty years. The boy waves the green flag twice, which causes the dirt on the pirates’ graves to bubble and boil, but before anything interesting happens, David suddenly realizes that Gerard doesn’t want him to wave the flag after all, and the ghost expresses his displeasure by messing around with a theremin for a while.
I don’t know what happens to the flag, maybe it’s supposed to sit up there in the tower room for another hundred and thirty years. Wake me up when we hit 2099, so I have some time to prepare.