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　　澳大利亚悉尼，新南威尔士正遭受严重的干旱，水资源短缺成为亟待解决的问题。为了应对这一情况，政府决定开发一项水资源循环利用的项目，其中包括将位于悉尼城市下方的一段废弃的铁路隧道加以利用。围绕隧道的改造和难民去向，在社会上引起了巨大争论。虽然沸沸扬扬，但是该废弃隧道的改造计划却戛然而止。与此同时，关于隧道中存在着神秘怪物的传言也愈演愈烈。　　一段Youtube上流传的视频引起了女记者娜塔莎·华纳（贝尔·戴利亚 Bel Deliá 饰）的注意，她联系了几名业内的好友和同事，带着摄像器材前往隧道中一探究竟，恐怖的旅程就此拉开序幕……

　　公元2021年，资料除了透过电脑输送外，还可利用人脑运输。专业运输员尊尼为了运送更多资料，不惜洗去自己的记忆。一次任务中，尊尼被客户输入过量资料，若他不在二十小时内找到输出密码，他便会倒毙。另一方面，日本集团为了夺取他脑内的资料，也对他展开一场大追杀。

　　In the year 2961, the time is after humanity and nature has recovered the land. A hunter named Cygnus is called to rise above his duty. He provides for Last Arc, a once nomadic band of survivors in need of food and water that is now growing scarce. The answer must be found before a group of outlandish Heretics descend upon them. Cygnus must voyage across the treacherous landscape to defend his people. Sent by Nova, the matriarch of the band, she acts based on her vision for Cygnus to find a seed of hope. The future of Last Arc is for him to discover, Cygnus ventures into a hostile landscape in search of an answer for his people. On this journey of encountering many traps and dangers, Cygnus discovers what has been hunting him is his identity.