Old Lobo, an incredibly strong and cunning wolf, was the leader of a pack of gray carnivores that terrified the shepherds of Currumpaw, a large cattle-breeding district in Mexico. On what only tricks people did not go to catch the robber; everything was useless. Each year the reward for his head was raised and at some point reached an unthinkable price of a thousand dollars. For the head of a murderer or a dangerous criminal people used to give much less.

But Lobo was smarter and more cunning than hunters.