Being a good baby-sitter isn't always easy, and the vice-president of the Baby-Sitters Club, Claudia Kishi, is learning that the hard way. She and the other club members have started getting strange calls on the job. Is it the Phantom Caller, a jewel thief who's been breaking into houses in the area? One thing is certain -- the Club has to take action to protect their kids! Claudia decides to investigate when she and the other members of the Baby-sitters Club receive mysterious phone calls while out on assignments.
