Li Qingshan survived the coal mine accident, but lost his co-worker Mo Zi who fought alongside him. With his guilt and longing for the mouse, he embarked on the road of search and redemption. During the recovery process, Qingshan established a deep emotional bond with Mouse, and Mouse's "disappearance" became a pain in his heart. Through training and persistence, Qingshan gradually stepped out of the shadows and set up a wooden sign for the mouse in the forest to express his condolences.
