I'm not a psycopath you have to believe me

Finding herself in a police interrogation room, Naomi (or as she prefers to be called, Twelve) has no idea what she has done, why she has done it, or how she was stupid enough to get caught (that is, if she even did anything). In an effort to prove her innocence, and accompanied by her best friend / drug dealer, Naomi must retrace her steps to see how and where she went wrong. Oh, and prove she's not a psychopath.