Journalist Sarah Kaplan normally covers the science beat, but when tragedy strikes in Las Vegas, she takes on an assignment unlike any she's had before, and while covering the devastating impact of an earthquake in Thailand, journalist Maryn McKenna reflects on tragedy in her own life.

As a marine biology student, Liz Neeley loves the order of science, but when a research expedition takes an unexpected turn, she must deal with the messy reality, and when Erin Barker is diagnosed with two chronic illnesses, she has to say goodbye to four of her favorite things.

When his students keep having “accidents" during nap time, kindergarten teacher Alvin Irby investigates, and in Aida Rosenbaum’s first month as a high-school science teacher, a fight breaks out between her students.

At 22 years old, Jenn Montooth is accepted to graduate school just as she discovers she's pregnant, and studying addiction as a neuroscientist gives Anna Miller a new perspective on her past.

When there's an explosion in the chemistry lab, graduate student Chanté Summers springs into action, and when Adriana Briscoe's professor accuses her of cheating, she scrambles to save her reputation and her spot on the biology lab's field trip.