The DNA of you and me

How does smell work? Specifically how do olfactory sensory neurons project to their targets in the olfactory bulb where smell is processed? Justin McKinnon has hired fresh-faced graduate student Emily to study that question. What Justin hasn't told Emily is that two other scientists in the lab Aeden and Allegra are working on a very similar topic and their findings may compete with her research. And to Emily's great surprise her rational mind is unsettled by Aeden.