Architectural designer Lin Yuan died suddenly from overworking due to unreasonable revision requests from his client, and accidentally reincarnated as Pang San, a marmot in the Qilian Cold Mountains. Relying on his civil engineering professional knowledge, he renovated shoddy caves, led his tribe to outsmart snow leopards and poachers, cleverly used fluid mechanics and structural mechanics to neutralize toxic smoke and hunting dog crises, and counteracted poachers so they reaped what they sowed. Coinciding with the border defense forces clearing minefields, Pang San braved the minefield with his light weight and geological talent to clear dangers, risking his life to save a platoon leader. Eventually, he was exceptionally recruited into the military, awarded a First-Class Merit, and became a special mine-clearing rat with an official establishment, achieving a counterattack in life.