How does smell work? Specifically, how do olfactory sensory neurons reach their targets in the brain where smell is processed? Justin McKinnon has hired Emily Apell 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. Emily was born focused and driven. She's always been more comfortable staring down the barrel of a microscope than making small talk with strangers. Competition doesn't scare her. Her special place is the lab, where she analyzes DNA sequences, looking for new genes which might be involved in guiding olfactory neurons to their targets. To Emily's great surprise, her rational mind is unsettled by Aeden. As they shift from competitors to colleagues and then to something more, Emily allows herself to see a future in which she doesn't end up alone. But when Aeden decides to leave the lab, it becomes clear to Emily that she must make a choice: follow her research or follow her heart.