In the near future, a huge space rift has torn apart reality. Countless monsters called "aberrants" have poured into the earth, and human civilization has retreated to the last barrier - the giant city "dome". In order to fight against threats and regain lost ground, elite soldiers "Rift Guardians" equipped with "Deep Diver" exoskeleton armor came into being.
Lin Ye, an experienced guardian captain, accidentally encountered an unprecedented aberration with high intelligence and tactical ability during a routine cleaning mission. This encounter not only caused heavy losses to his team, but also revealed the terrifying truth that the aberrations were not just a bunch of brainless beasts.
When he returned to the dome with this important information that could subvert mankind's current strategy, he was questioned and suppressed by senior officials. The only evidence was confiscated, the sacrifice of his comrades was classified as an accident, and he was isolated and grounded.
Within the bureaucracy and insensitive system, Lin Ye realized that a war that no one knew about had begun. The real enemy not only lurks in the ruins outside the wall, but also hides in the shadow of human power. In order to uncover the truth, avenge his fallen comrades, and to protect the dome of thousands of lights behind him, Lin Ye decided to break the rules and set foot on the border of the forgotten abyss alone.
