Premise: David Tiant is a 15-year-old trying to grow up sane in an ethnically mixed, upwardly mobile family. Dad Joaquin is a proud yet impossibly pragmatic Mexican-American and his mother, a fierce Irish-American. Older sister Maria, a socially active cheerleader, rejects her Mexican roots and insists she's Spanish. David's mixed heritage only adds to the eternal adolescent dilemma of exactly how and if he fits in. ``Greetings From Tucson'' examines the themes of cultural identity, family and class. The series is based on the life of the show's creator, Peter Murrieta.