The bells stopped, so suddenly that their sound quivered in the air. For the first time in an hour, the loudspeakers spoke, but this time the words were different. 'We are about to abandon ship. All passengers proceed immediately to the starboard side. We are about to abandon ship.'   Stuart and his twin sister Sandra are coming home to Wellington on the ferry. Stuart knows he'll enjoy the trip - he's a good sailor. But it's April 1968 and the ship is the Wahine. As the tragic events unwind Stuart and Sandra must battle to stay alive. A vivid and compelling picture of the Wahine's last hours.