With the houses of Arborville, New Jersey, decked out in festively frightening decorations, it's easy to mistake a real dead body for a fake. But Pamela and Bettina are alerted by the screams of teenage trick-or-treaters to the corpse next door. Their neighbor Adrienne's sister, visiting from New York City, is slumped on the porch, fatally stabbed. And with countless people traipsing around in costume, the killer might be as elusive as an apple in a bucket of water.

The victim was a charismatic college professor and fierce feminist, and soon the women are infiltrating her social and academic circles to collect clues. But some scandalous local gossip also suggests that Adrienne, not her sister, might have been the target. Now, Pamela and Bettina will need all their creative skills to solve this ghoulish crime . . .