* The prison as a place of transformation. The prison can also be seen as a place of transformation, where inmates have the opportunity to change their lives. This metaphor is explored through the character of the protagonist, who experiences a number of personal growth moments during his time in prison.
* The prison as a metaphor for the human soul. The prison can also be seen as a metaphor for the human soul, with its dark corners and hidden depths. This metaphor is explored through the character of the antagonist, who is a deeply troubled and damaged individual.