When the global volcanic chain erupted simultaneously, tens of billions of tons of volcanic ash obscured the sun, and the earth fell into an eternal "nuclear winter." The surface is frozen and dead, but in the "Dragon's Back" mine thousands of meters below, thirty-seven survivors are lingering - among them are experienced miners, doctors carrying first-aid kits, tourists who strayed into the refuge, and even newborn babies.
Miner Lin Feng is familiar with every lane of this underground maze, but he can't see the cracks in human nature. Doctor Su Qing used a scalpel to sew up the wound, but could not sew up the increasingly depleting medicines and hope. When there are only three months left in the food reserves, the ventilation system begins to rust, and unknown vibrations are heard from deep in the mine, they must make a choice in the darkness: Should they guard the crumbling shelter and wait for the faint dawn, or should they take their remaining courage and cross the dead surface covered with volcanic ash to find the legendary "Second Eden" that has not been swallowed up? In the embers in the center of the earth, love and suspicion are fermenting at the same time, and the fire of human civilization is held in their bloody palm prints.
