Jessica Alba may be sexy and outgoing in real life, but in AN INVISIBLE SIGN, she plays a woman who is more comfortable with numbers than with people. Mona counts and does math in her head, but she isn't sure how to interact with people. When she gets a job as a second-grade math teacher, the science teacher draws her out of her shell. MAD HOT BALLROOM's Marilyn Agrelo directs this quirky romantic comedy based on the novel by Aimee Bender.