Filmed by a young French Muslim journalist who infiltrated the group with a hidden camera, the Canal Plus documentary takes an extraordinary inside look at the group, which called itself the Soldiers of Allah.
The cell was nominally led by a young ex-convict who called himself Abu Oussama, who speaks dreamily about his coming death, the palace that awaits him in paradise, the winged horse made of gold and rubies, and the women: "I'm not making this up, I swear," he breathes.
Ramzy told The Associated Press the cell was actually directed by a Frenchman sent home from Syria by the extremist organisation to plot an attack.
Remzy was considered valuable because, unlike the other members of the cell, he had no criminal past and had never been identified as a radical.
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"They said since I was deradicalized, since I was quiet ..." he says, giggling toward the camera he cannot see. "It's all part of the ruse, brother."
Oussama appears to trust Ramzy, but not all of the cell's nine members had the same faith. One, who went by the name Joseph, warns Ramzy once that he's been found out, without ever explaining. The others ignore the warning, apparently even after all but Ramzy and the Islamic State fighter sent from Syria were rounded up.
Islamic State carefully controls its public image via a sophisticated propaganda apparatus and, in at least one case, allowing a crew to film its members in Syria under specifically vetted conditions.
A second journalist involved in the documentary, who went by the name Marc Armone, said he and Ramzy wanted to get past an edited version of Islamic State and into the minds of its European recruits.