Set in the universe of Cixin Liu's bestselling Three-Body Problem trilogy, and continuing the saga. This original story by Baoshu-published with Liu's blessing-charts the aftermath of the conflict between humanity and the extraterrestrial Trisolarans.

At the end of the fourth year of the Crisis Era, Yun Tianming, riddled with cancer, chose to end his life. But death is no release for Yun Tianming – merely the first step in a journey that will place him on the frontline of a war that has raged since the beginning of time. As Yun Tianming lay dying, his brain was extracted from his body, flash frozen, put aboard a spacecraft and launched on a trajectory to intercept the Trisolarian First Fleet.

It was a desperate plan, almost certain to fail. But there was an infinitesimal chance that one day Tianming may, somehow, send valuable information back to Earth. And so he does. But not before he succumbed to subjective centuries of alien torture and betrayed humanity. Rewarded with a cloned body by the Trisolarans, Tianming has spent millennia in exile as a traitor to the human race.

But now he has a final chance at redemption. A being calling itself The Spirit recruits him to help wage war against a foe that threatens the existence of the entire universe. But Tianming refuses to be a pawn again. He has his own plans...