Identity

The story follows Cal Blair, a man confronting an intimate betrayal when his identical twin impersonates him, setting off tensions in his relationship with medical researcher Tinker Elliott. Against a background of neurosurgical laboratories and spacefaring expeditions, the characters pursue medical mysteries and elusive artifacts: a resonator-linked Hoard, cryptic Keys, and the search for causes like Makin's Disease. The plot balances personal identity conflicts and twin rivalry with scientific problem-solving, as the protagonists debate loyalty, professional ambition, and the risks of using resonant technology to track hidden caches and unravel dangerous duplications of self.