Zack Ramos is training for two things: being a parent to his twelve-year-old sister once his mother's early-onset Alzheimer's (the same kind he and his sister each have a 50% chance of developing--but let's not think about that) progresses too far, and running a one hundred mile race through the mountains of Tennessee. His support system is longtime girlfriend Jordan Jonas, who's sweet, sarcastic, and entirely virtual. They've been talking for years...