Giovanni, the nephew of the president of an Italian society to safeguard good customs, is sent to Brazil to study aboriginal tribes. He stays in a boarding school sponsored by his uncle, but is actually a dating house run by Madame.
At the highest place in Tarahumaran mountain, a Shaman was brutally murdered. The investigation leads detective Aguilar to ask for help to a veterinarian and a priest, to find out that the crime is just the beginning of a series of brutal murders by a nahual (Wolfman)
A honest cop befriends a prostitute and attempts to catch a powerful drug dealer.
