How she accepts it. How she enters willingly into the cold. How her skin, almost immediately, becomes cold as the water is, her body's heat pushed deep down under, to protect her internal organs, that flush with blood, that float like fish in some warm Mesozoic ocean as her heartbeat thunders round them, as they move, just for now, companionable, together. She see penguins on the dipping, rising shore and people bundled up who look like penguins, black against the snow. Her back up team lean from their inflatables as she threshes water up like bed sheets, speeding, swimming faster than she ever swam before, to generate more warmth, to stay alive, then something shifting inside her as she starts to swim straight out to sea, moving so fast they can do nothing now but watch her slip away.