In the year 2350 AD, the earth was dead. The last bloodline of mankind is floating in the boundless universe aboard the Generation Ark "Spark". Lin Yuanhang is a maintenance worker who lives in the "grey area" at the bottom of Ark and struggles to survive. Once, while performing dangerous maintenance in the restricted area, he accidentally activated a dormant alien interface-"Keystone" that was integrated with the Ark's core system. This gave him unprecedented access. He can spy on every secret of the Ark: the supplies hidden by the upper class, the fatal gaps in the life-support system that they ignore, and the chilling truth behind the Ark's voyage. Starting from secretly upgrading his living environment and helping his friends, Lin Yuanhang, an unknown person from the Gray Realm, launched a silent war against the corrupt rulers of the upper class. He incarnates as a ghost in the system, uses his god-like authority to expose conspiracies, avoid disasters, and finally seizes the steering wheel of human destiny and leads the Ark to the true dawn.
