Because of a single black dog, truck driver Xu, his wife, his girlfriend, and a poet recovering from mental illness, are all caught up in a chain of calamities that begins with a debt problem.When Xu's wife gets pregnant, Xu sends his dog to stay with Ma, the manager of a company. Unexpectedly, Ma cooks the dog to treat a visiting debt collection agency. He holds them off, but Xu wants revenge. When he sees Ma's pitiful situation though, he finds himself unable to go through with it. Xu is trapped by his lustful desires; Ma is a prisoner of money and work. When Xu's wife and his girlfriend meet by chance, a certain friendship starts to grow between Ma and Xu at this strange moment.