Withered Hands Hold Mountains and Rivers

Gu Can, on the surface, is a taciturn handyman with a disabled left hand in the "Iron Flag Escort Agency" in a small border town. His actual identity is the only surviving young master of "Tiangong Villa" whose family was wiped out by mysterious forces fifteen years ago. During a family crisis when he was young, he forcibly activated the forbidden martial arts passed down by his family but had not yet mastered it, which resulted in his left hand containing the majestic "Death Qi". It is usually withered and useless, but at the critical moment of life and death or when his emotions are extremely fluctuating, the death Qi will explode uncontrollably. How should he survive, find out the truth about his life experience, avenge his family, and find his own way in the chaos of the world?