In 1852, Adler and Adolf Beck's father died on an expedition to a glacier, and their lives separated. One became a respected climate scientist, one a successful opera singer touring the world. Or so he claimed. But both remained in touch, if only to share the mysterious voices only they could hear.

Charles Ramsey also has a twin. It is 2050, and Greg is a journalist reporting on the climate-change inspired conflicts around the world. When Charles is made redundant from his job as a profiler for the police and sent home with a new experimental chip in his head, he is urged by his brother to explore a little-known aspect of their family history.

​All of these people are connected. All of their lives will intersect. And the climate of their world will keep on changing.