Once, an evil spirit entered a young man. The wise men tried to get the spirit to tell them his name or his wife's name. And whenever they reminded him of his wife, he began shrieking and said that she was an agunah, a woman whose husband has vanished. This meant that she couldn't remarry, even though he had drowned at sea. And the wise men could not allow her to take another husband.
The spirit wanted the wise men to allow the woman to marry again. And he gave them many signs to prove he had drowned at sea. But they didn't know where he had been at home, and so they said: "We cannot permit it."
And now he shrieked because she had become a whore, since they didn't allow her to take another husband.
The wise men asked him why he had no rest and what sins he had committed.
He said he had committed adultery.
The wise men asked who the woman had been.
But he wouldn't tell them, because she had been dead for a long time. "It wouldn't help you if I did tell you." And he added: "I am the kind of man who our sages said ought to be punished with all four capital punishments, for committing adultery. But I was not punished."
And as they were talking, the young man got to his feet. The wise men asked him:
"Why are you standing now?"
And the young man said:
"Because a scholar is about to come in."
They looked around. And just then, a scholar came in, exactly as the young man had foretold. And after him came a group of young men. They also wanted to hear what was going on.
Whereupon the evil spirit said:
"Why did you come here? To see me? There are some among you who have done what I did, and you shall be as I am now."
The young men were terror-stricken.
Then the evil spirit said:
"Why are you so surprised? That's the one, standing there in white clothes. He lay with a man. That's as bad as lying with a married woman.
The young men were terror-stricken and peered at one another. Meanwhile, the young man in white clothes began shouting:
"It's true, by God! I did it, and so did he!" 
And they owned up to their bad deeds.
One of the wise men now asked: "How did you know what they did?"
The spirit laughed and said:
"It is written that whatever a man does is inscribed in his hand."
They said to him:
"How could you have seen their hands? They were under their cloaks."
The spirit laughed again and said:
"Can't I see everywhere?"
Then they asked him how he had come into the young man.
The spirit said he had had no rest in the water, the fish had eaten his body. His soul went out and passed into a cow. The cow had gone wild, and her owner, a Gentile, had sold her to a Jew. The Jew slaughtered her, and the young man was present and the spirit flew into him.
The wise men finally managed to exorcise the spirit from the young man, and the spirit flew away.