Eight people meet. Seven of them have agreed to accept and eat a piece of pie from one of them. They agree that they will act as if the pie were poisoned, and die, one by one, to see if the one man who doesn't know this is all a set-up eats the pie.
But the pie really is poisoned. And when the people really die, the fourth refuses, saying this was supposed to be a joke. But the fifth eats the pie anyway, as does the fourth, and sixth.
When it is just the man whose idea this was and the man who didn't know are left, the man who didn't know convinces the man whose idea this was to eat the pie himself.
The man who didn't know is at the table by himself. There is one last piece of pie.
The eight people represent humam's from history:
Jesus Christ (teacher)
Joan of Arc (faith)