Onew has an ability. He can glance through the future but only a day or two away from the present. So when he keeps having recurrent dreams one year ahead of time... Is it really the future or his mind is just too imaginative and he'd might as well be a suspense novelist?

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Yeeun. Park Yeeun, Onew tries to recall and understand why he has been having these disturbing dreams – disturbing because there are days where he plays the protagonist, Yeeun, and others where he’s the killer and that sends more terrifying chills down his spine and make the hair of his body stand more. 

From the brain and the brain only arises our pleasure, joys, laughter and jests, as well as our sorrows, pains , griefs and tears. These things we suffer all come from the brain, when it is not healthy, but becomes abnormally hot, cold, moist or dry.

– Hippocrates.