Reflection in a Dead Diamond

John D., a septuagenarian living in a luxurious hotel on the French Riviera, is intrigued by his neighbor, who reminds him of his wildest years on the Riviera in the 1960s. Back in those days, he was a spy in a world that was constantly developing and full of promising opportunities. One day, his neighbor mysteriously disappears, and John is forced to face his demons: have his old adversaries returned to wreak havoc on his idyllic world?