enigma

Enigma

Winston Churchill once said "Russia is a riddle wrapped inside a mystery inside a enigma".

this refers to a puzzle something mysterious or inexplicable or a riddle or difficult problems. a enigma got its name from a coding machine made during world war 2. this machine relied on a complex series of steps that are used to make virtually unbreakable codes.

In thrillers this is commonly something which the protagonist has to try to find out or solve before the narrative is resolved and the film finishes.a enigma before it is solved create a lot of suspense, discussion, debate and interest.