Within the pages of this novel, one encounters a kaleidoscope of intriguing figures, each driven by an unyielding pursuit of their personal ambitions. Many would not hesitate to deceive, betray, or even commit murder to achieve their ends. Among them is Saul Dagenham, a fervent patriot cursed with a radioactive presence, and Robin Wednesbury, a telepath who, enigmatically, can only project her thoughts but remains deaf to the mental musings of others. Then there is Presteign, a businessman molded from the archetype of ruthlessness, caring for no soul save his daughter, yet weaving manipulations with a masterful touch.

In this complex tapestry, Olivia Presteign stands out, possessing a vision limited to the infrared spectrum and a nature even more merciless than her father's. Alongside, Capt. Peter Y'ang-Yeo-vil, a detective of diverse heritage, speaks volumes without uttering a word, conveying his insights through nuanced body language. Despite this captivating ensemble, the spotlight inevitably falls upon Gully Foyle. He is the linchpin of this narrative, with other characters serving to propel the story forward or to reveal the multifaceted layers of Gully's character.

Gully embodies the everyman, laden with untapped intellectual promise, yet shackled by a lack of ambition. It takes a seismic jolt to awaken him to his latent potential, a recurrent motif in Bester's storytelling universe.