Jack and Clu decide to pool their money together and buy a used car. Molly is reluctant to allow it since her husband died in a car crash, and the boys' car turns out to have a mind of its own.
At a concert Fi meets a girl forced into entertainment slavery, for a reason. She is a siren, but unlike the evil ones depicted in legends, she just wants to go home and avoid the world.
In a small town a visit from aliens has made the wheat from their crop circles have telepathic properties. Anyone who eats it can read minds, which poses an issue greater than anyone could imagine.
When the kids find a mysterious carving on the beach, Ned becomes possessed by the spirit of an enraged sea captain. Clu prepares to leave for college.
Fi discovers she and her friends are the only people in a town where the dead come back on Halloween to carry mortals to the realm of the dead where they must stay for an entire year in torment.