Have you ever wondered what dreams actually are? Are they really just nonsensical narratives strung together by our brains as we sleep, or are they something else entirely? Could it be that they are just as real as the world we live in while awake? The truth may very well surprise you. When we fall asleep, we actually wake up in another world, slightly different than the one we are accustomed to. Dreams are memories of this other place - we just can't seem to make sense of them. But what if we could? What if we could seamlessly live in both worlds without any lapse in our memory? With the help of an experimental medicine, one man can. Unfortunately for him, his newfound ability quickly becomes a burden. Before long, he comes face to face with some grave questions - just what exactly is real and which one of his lives is worth dying for?