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.