What person purportedly dies before the group figures out that gravity reacts differently in each room?
The film starts with a young woman named Becky, shown to be trapped in the Cube. She enters another room, but unknown to her, the room has reversed gravity, as she is pulled up, and it is implied that she is killed.
Some time later, a woman named Kate, detective Simon, a blind girl named Sasha, engineer Jerry, game developer Max, lawyer Julia, and an elderly woman named Mrs. Paley find themselves trapped in brightly lit cubes, each with a panel on each of the six sides, which are doors to other rooms. They come across Colonel Thomas Maguire, who says that they have to solve the code in order to leave the mysterious place. Just as he finishes, a wall begins to close in on the group. The group escapes while Thomas stays behind, while Kate and Simon watch in horror as Thomas is disintegrated by the wall. Later experiences around the cube reveal that gravity can operate in different directions in each room, while Mrs. Paley, who is revealed to be a retired theoretical mathematician, and Jerry, realize that they may be in a tesseract, or a hypercube. Kate notices the numbers "60659" everywhere they go.
Becky