A lock with no key

"The girl screamed and screamed and screamed until her vocal chords collapsed and she was rendered mute - then she kept screaming.  She slammed her fists against the walls and pounded relentlessly... paying no heed to the impact of recoil of the wall against her fists.  She damn near broke every bone in her tiny hands.  She twisted, jerked, and wretched around in the room.  She seethed with such fury that she felt like she could burst open every blood vessel in her brain and die instantly.  


She knew she would never get that far.  That in part, is what drove her mad.  The simple, and yet so... profound of an idea, that she will never again reach the outside, and that these four walls are her world now.  These four walls, with infinite space and imagination were her bastion.  These invisible walls that held her so tight and gave her unprecedented freedom, is what pried at her very soul.  


She was locked in her head and she had lost the key.  She would never escape.  She would be forever confined within the mental space within her head - the wind, the water, the earth and fire were elements she could only dream of.  


Memories would be forever replayed over and over, sensations all forged into what she would imagine what they would feel like.


The thought that she would never taste a real cupcake again passed through her mind."