Behind that door ?😱

Delving in to peep what is behind that door

Yet one simply has no idea what one is looking for

So the conundrum of a question is in the route of the core

An enigma, a problem, puzzlement and a rune

That whistles words of wonderment. “Who” What” or “Where” to a tune

Whilst this is a sixty-four-thousand-dollar question 

And alas,  such a tough nut to crack

An abstruseness of a cliffhanger with a thriller attack

This closed book of a brainteaser

Can drive one right around the bend