While vacationing in a seaside town, Nancy learns her father has been kidnapped. She and Ned rescue Carson Drew and help him investigate a cosmetic company’s suspicious operations. Meanwhile, the girl sleuth is captivated by another mystery. Stories about the eerie moans from a cave carved in the jagged wall of the bluff compel her to explore. Several frightened townspeople claim to have seen a ghost, accompanied by the mournful sound of a tolling bell just before water rushes from the cave. During her searches, Nancy discovers the true cause and reasons behind these mysterious occurrences! This book is the revised text. The plot of the original story (©1946) is similar with minor revisions.