In 1852, Adler and Adolf Beck's father died on a glacier, and their lives separated. One became a respected climate scientist; the other a globally renowned opera singer, or so he claimed. They remained in touch, to share details of the mysterious voices only they could hear.

In 2050, Charles Ramsey also has a twin. Greg is a climate journalist. Charles used to be a police profiler, but his redundancy leads to him being sent home with an experimental chip in his head. His brother urges him to explore a little-known aspect of their family history.

All these people are connected, impossibly, inexorably. All their lives will intersect.

And the climate of their world will keep on changing.