Six friends in the computer department receive a message to download an application called (Dark Ritual) from a person who finds it difficult to have a request rejected.
'THE FRENCH SUSPENSE KING' NEW YORK TIMES'ONE OF THE GREAT THRILLER WRITERS OF OUR AGE' DAILY EXPRESS'THE KING OF EUROPEAN NOIR' LA REPUBBLICA, ITALY'IT'S NO WONDER THAT GUILLAUME MUSSO IS ONE OF FRANCE'S MOST LOVED, BESTSELLING AUTHORS' HARLAN COBENEVEN ANGELS HAVE THEIR DEMONS .
