Garrison Duty

After breaking with his mother, Leng Xueyang returns to his hometown. At the Nanshan outpost, he and three comrades and a dog lead a life guarding the border, patrolling the mountains, fighting poachers, and rescuing people from icy lakes. In the vast Nanshan Mountains, he gradually uncovers clues hidden among his grandfather's belongings, an abandoned wooden cabin, underground passages, and a pulsing signal, all connected to the disappearance of his father and a geological survey team... He and his comrades go from suspicion to standing side by side, while he and Li Yue Liang, a tour guide, go from trading barbs to working together. Piece by piece, they uncover the truth behind the geological team's disappearance and unravel the many mysteries of Snow City...