Ghost Whisperer: The Haunted

"It's the Homecoming Dance, and teen beauty Krista Phillips wants to be Homecoming Queen. Only one thing stands in her way: she's dead. But that won't stop Krista from destroying everything in her path to get that crown. Melinda tries to cross over the furious ghost, but tangles once again with her old nemesis, Osiris. Bigger, badder, and back for more, Osiris lends his power to Krista and her reign of terror. Melinda must stop them both before they destroy Rockland High"--Publisher's web site.