Adar Beck

Eight candidates have reached the final stage of selection to join a mysterious corporation. Entering a windowless room, an Invigilator gives them 80 minutes to answer 1 simple question. He outlines 3 rules they must obey or be disqualified: don't talk to him or the armed guard by the door, don't spoil their papers and don't leave the room. He starts the clock and leaves. The candidates turn over their question papers, only to find they're completely blank.