Ten-year-old Christina Rose is convinced she has "Ghost Radar," meaning she can sense when ghosts are nearby. Not fake, creepy movie ghosts, but REAL ghosts. Like the ghost of her mother, who died in a plane crash when Christina was only 3. Christina knows her mother's spirit came to visit her the night of the accident, but nobody believes her. Now Christina and her family have moved from New York to North Klondike, California, and more strange things are happening. Christina's next-door neighbor and new best friend Roberto Wing is convinced the Roses' house is haunted by not one but two very scary ghosts. So Christina, her twin brother Danny, and Roberto form a ghost-hunters' club, determined to uncover the truth behind the bizarre happenings. As they investigate, they realize that everyone has a real ghost story to share—some funny, some foolish, and some quite frightening.