In a city built among the stars, the greatest danger may come from the secrets of Earth.
Z9 City is the crown jewel of the Zenith Colony - a vast cobalt-blue space station engineered with revolutionary PiMar technology and powered by the rare mineral magtronium. For sixteen-year-old Trig Moore, it has always been home. He has never walked on Earth, never felt real gravity, never breathed uncycled air.
But the past has a way of reaching into even the most carefully constructed worlds.
Trig and his adopted brother Bobby Johnson pilot Mirage, the legendary ship designed by their grandfather, Dr. Gransom - founder of the Zenith Colony and one of the most brilliant scientific minds in history. When a routine systems repair reveals that Mirage has been secretly hacked, it becomes clear that someone is searching for something - and that search may reach back to Earth itself.
Far from Z9 lies Daoqin, a small and forgotten island once dismissed as politically insignificant. Yet hidden within its deep caves is a people unlike any other - the last pureblood humans on Earth, whose blood holds extraordinary healing properties. For decades, powerful interests have quietly exploited that secret. Now the forces that reshaped Earth's politics are moving again.
As Trig's disciplined resolve and Bobby's fearless instinct pull them deeper into a widening conspiracy, they must confront questions that strike at the heart of everything the colony was built to protect.
What is worth preserving?
What is worth sacrificing?
And what happens when healing becomes a commodity?
Z9 City: The Champion of Daoqin is a sweeping science-fiction adventure about legacy, loyalty, engineered worlds, and the quiet strength required to stand against corruption. Blending high-stakes space travel with deeply human relationships, it explores the cost of progress - and the courage it takes to defend what is pure.