This is a detective mystery novel that combines suspense, science fiction and thriller elements. The story revolves around a luxury sightseeing train that travels between the capital and the sea. Its seventh VIP carriage mysteriously disappears once a week, and is actually intercepted by an underground man-made world called the "Devil's Cave". The master of the Demon Cave—a mutant delusional—intends to achieve his ambition of dominating the world by copying and replacing important figures around the world. The protagonist Allen accidentally got involved in this conspiracy because he took the train in place of his friend Zhao Hongyi. When the train stopped due to a tunnel failure, the seventh carriage sank into the ground and the passengers were replaced with clones. Allen escaped because of his inconsistent identity, and was determined to destroy the devil's cave and rescue the real person. As the story develops, Allen embarks on a global journey to track down replicants, faces numerous crises and moral dilemmas, and reveals a shocking conspiracy affecting world power.
The novel is divided into three volumes, each focusing on a different stage of the story, from initial unexpected discovery to global struggle and rescue.
Volume arrangement
Volume One: Awakening from the Abyss
It focuses on the process of Allen accidentally entering the devil's cave, discovering the conspiracy and escaping, as well as the preliminary investigation after returning to the surface.
Volume 2: Shadow Pursuit
It tells the story of Allen teaming up with allies to track down replicants around the world, facing the counterattack of mutant forces, and digging deeper into the origin and ambition of the Demon Cave.
Volume Three: The Light of the End
In the climax, Allen and the team launch the final operation to rescue the imprisoned real people and dismantle the replicant network, while dealing with the moral and social fallout.
