In 1912, the Saint Anna, a Russian exploration vessel in search of fertile hunting grounds, was frozen into the polar ice cap, trapping her crew aboard. For nearly a year and a half, they struggled to stay alive. As all hope of rescue faded, they realized their best chance of survival might be to set out on foot, across hundreds of miles of desolate ice, with their lifeboats dragged behind them on sledges, in hope of reaching safety. Twenty of them chose to stay aboard; thirteen began the trek; of them all, only two survived.