Never give a recently fired professor a knife and a Day of the Dead mask. You're just asking for trouble. but, let's back up... Humberto Valdez AKA "El Mastro" is teaching at a small town junior college and he takes his Chicano studies course seriously ... perhaps a bit too seriously. With the exception of a lone student, "El Maestro" is considered by the pupils and faculty alike to be a joke and out of touch with the real world. "El Maestro" comes down with a bad case of "Aztec Blood Lust" after being fired.