Trevor Reznik, a machinist, has lost the ability to sleep. He has not slept in a year. Fatigue has led to a shocking deterioration of his physical and mental health. Suspicious of his appearance, Trevor's co-workers first shy away from him, then turn against him after he's involved in a shop accident that costs a man his arm. Plagued with guilt, Trevor's shame becomes suspicion, then paranoia. First he finds cryptic notes left in his apartment. Next he's told that a mysterious co-worker involved in the accident doesn't exist. Are these mysteries part of a plot to drive Trevor mad? Or is it fatigue that's robbing him of his reason? Determined to find an answer, Trevor investigates the strange occurrences that are turning his world into a sleepless nightmare. Yet the more he learns, the less he wants to know.