The Black Truck

Grace Cordney is in a car crash, causing her brother to slip into a coma and her to go unconscious for weeks. After she wakes up, she begins to hear her brothers voice, as he does hers. He claims she has been unconscious for weeks while she states the opposite. Now, having discovered about their abilities, the two try to make their way back to each other even though they are separated by the boundaries of the dimension that each one is stuck in.