"Cube Zero" is a 2004 science fiction horror film and the third installment in the Cube film series. It follows a technician named Eric Wynn who works for the organization that creates the deadly Cube, a mysterious and lethal structure filled with traps. As he witnesses the horrors inflicted on the test subjects, he begins to question the morality of his work and the purpose of the Cube itself. The film explores themes of free will, morality, and the nature of suffering. It provides a backstory to the Cube series, revealing the inner workings of the organization behind the Cube and the fate of those trapped within it.