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.