Fat, forty-four, father of three sons, and facing a vasectomy, Mark Obmascik would never have guessed that his next move would be up a 14,000-foot mountain. But when his twelve-year-old son gets bitten by the climbing bug at summer camp, Obmascik can't resist the opportunity for some high-altitude father-son bonding by hiking a peak together. After their first joint climb, addled by the thin air, Obmascik decides to keep his head in the clouds and try scaling all 54 of Colorado's 14,000-foot mountains, known as the Fourteeners -- and to do them in less than one year.