Ring of Epoch

Extreme weather sweeps the planet and human civilization comes close to collapse. Survivors living in the future set up the Guardian Program and select Daniel Mills as the key figure in it. Daniel owns a ring handed down through his family. Inside the ring is a space with no limit, and the survivors treat it as the last resource they have. A commander named Nora directs Daniel from a hundred years ahead of him. On her instructions he sees through a deception, keeps the ring out of other hands, and gathers supplies for the survivors around him. Misunderstandings and setbacks slow him. Two friends and a woman fighter join him. Nora later crosses the hundred years herself to work at his side, and the group starts building a shelter for the survivors.