The Mexican guerilla leader Tepepa and his gang fight against the chief of police, Cascorro.

Relatives brawl over the estate of a deceased grandmother who owned an insecticide factory.They stop at nothing, including bumping each other off.

After a close call on on the highway, Marco--a very famous singer/songwriter in 1968--climbs onto the roof of his car and starts to sing. After an unsuccessful suicide attempt, he tries to take his life back into his own hands.