With a lifeless gaze, Rachel Gardner yearns to end her existence. She finds herself trapped in a basement, ignorant of how or why she ended up there. It is there that she encounters Zack, a bandaged murderer seeking his escape. Although he promises to kill her once he's free, Rachel joins forces with him to climb their way up the floors of the building in pursuit of freedom. Their journey, however, becomes hindered by a parade of bizarre characters, all of whom Rachel inexplicably recognizes. What is her connection to this structure, and why was she placed within its walls? With each level presenting a new obstacle, will Rachel and Zack successfully attain what they seek?