Chen Sanjin is a young owner of a coffin shop. He has three major hobbies in his life: drinking, avoiding debts, and bickering with a lame old yellow dog. He wore a rusty iron knife on his waist, and everyone in the town laughed at him - that knife couldn't even cut tofu. Until the night of heavy rain, seven killers stepped on the old yellow dog's lame leg. No one saw clearly how he pulled out the knife, only a cold arc appeared in the moonlight. Before dying, the old yellow dog turned into golden light, and Chen Sanjin realized that the dog had guarded him for eighteen years, guarding the secret of the powerful sword left by the Sword Immortal in Shu thirty years ago. The rusty knife shattered the first layer of rust, and the world was no longer peaceful. A coffin, a pot of strong wine, a rusty knife - he came to collect debts in this world.
