Four people working in a hostile environment are trying to escape an impending disaster. But one of the four has a deadly mission in mind and this will impact greatly upon the rest of the team. But which one of the four is it? D.One tells the story of a race against time to root out the traitor and uncover the treacherous 'knave' in the pack. As the truth gradually emerges fear and suspicion drives the tension ever higher. The group of three men and a girl desperately seek to escape the looming catastrophe, but have no idea which way to run and furthermore whom - if anyone - they can trust.
—Lee Gaskin