Awake and asleep, Tom has increasingly different lives. Awake he is a climber, scaling the cliffs by Tower Rock, and asleep, he finds himself in a vivid dream-world where he is the carrier, responsible for a strange and beautiful child, and forever in search of the elusive Sleeper. Tom can no longer dismiss his night journeys as just dreams once his sleeping and waking lives start to merge. The real-life versions of characters in Tom's dream-world start to fall into inexplicable, deathlike comas, and Tom realises that his two lives are heading towards an inevitable collision. Tom doesn't know what will happen next, but he is certain of one thing: it's all terrifyingly out of his control.