Kristy, Claudia, Mary Anne and Stacey have had some strange adventures since they started the Baby-sitters Club, but nothing's been as spooky as what's going on right now. The baby-sitters have been getting mysterious phone calls when they're out on their jobs. When a phone rings and they pick up, there's no one on the other end of the line. Claudia's sure it's the Phantom Caller, a jewel thief who's been operating in the area. They decide to take action with some very mixed results.
