Cube Zero (2004) on Netflix

Plot summary

Ryjkin runs through the Cube and is sprayed with a liquid he takes for water until his body begins to dissolve. Eric Wynn watches from an observation room with Dodd, his senior, and beats him at chess without looking at the board. Wynn asks about colleagues who have vanished; Dodd tells him to stop asking questions and stay away from the Cube's occupants. Orders come to record the dream of one captive, Cassandra Rains, and Wynn sees her taken from a forest while walking with her daughter Anna. Waking inside the Cube, she meets the other captives, among them Robert P. Haskell, who carries the same forehead tattoo as the soldier who seized her. Wynn learns that every occupant faced a death sentence and chose a wiped memory over execution, and that Cassandra Rains has no consent form.