Cube Zero (2004)

Synopsis
Writer/director Ernie Barbarash helms this prequel to the sci-fi thriller Cube, with events that unfold some time prior to those in first picture. Here, another group of prisoners navigate the treacherous confines of their futuristic trappings. Each step is potentially the last as the deadly last traps hidden in the sparse rooms find the numbers of the unwilling prisoners quickly thinning. Only when they can figure out the mysteries of their constantly changing prison will the surviving inmates have any hope for escape, and even then there is no guarantee of freedom -- much less survival. As the cube workers who monitor the prisoners progress bear witness to their increasingly grim bid for survival, a sudden sting of remorse finds one of the employees empathizing with the victims and plotting to assist them in their unlikely escape. ~ Jason Buchanan, All Movie Guide