The Cinderella Murders — Diane Sawyer

A young woman disappeared three weeks ago from a popular tourist hotel along the scenic New Jersey shore. With nothing but a cryptic phone call to go on, Kelly Madison, the victim's sister, demands action from the local police, who seem oddly reluctant to look for trouble. Luckily for Kelly, one detective agrees with her suspicions, and together they try to piece together the victim's last few days in the sunny seaside town.

With help from a local college professor who has been documenting the very quiet disappearance of several young women in the area, the clues point to a horrifying possibility -- the woman has been abducted by a serial killer. Why are so many townsfolk willing to look the other way as murder happens right under their noses? Kelly's persistence soon puts her in harm's way, stalked by a madman eager to make her his next victim.