When Berkeley Engineering student Silvia Saldana receives a C- on her Chicano History paper, she seeks out her professor to beg for a better grade that her Abuela will approve of. But what she discovers is that her Chicano History Professor, along with his cook Chuey, are using their Taco Truck not only to feed hungry students near campus, but to also wage an inter-dimensional war against demons and monsters her Abuela told her about as a child. Can Silvia join her Professor and help keep the monsters and demons from entering her world and study for her chem exam, or will evil cross into her realm?