Frank Rader was dead.
But sudenly, he recovered. It was time to celbrate. A holloween party in the Rader's rec room would be just right - cheerful, harmless fun with a group of good friends.
Of course, the party had nothing to do with the grisly murders in the town.
Of course, it had nothing to do with Cheryl Rader's mounting horror at the change in her husband. Or her growing terror for her daughters.
Of course, it wouldn't turn the group into servants of Evil, with human sacrifice as their price of survival.