A competitive diver and an ace swimmer dive into forbidden waters in this steamy college romance from the New York Times bestselling author of The Love Hypothesis.

Scarlett Vandermeer is swimming upstream. A junior at Stanford and a student-athlete specializing in platform diving, Scarlett prefers to keep her head down, focusing on getting into med school and recovering from an injury that nearly ended her career. She has no time for relationships—at least, that’s what she tells herself.

Lukas Blomqvist, swim captain, world champion, and all-around aquatics golden boy, thrives on discipline. It's how he wins gold medals and breaks records: complete focus with every stroke. On the surface, Lukas and Scarlett have nothing in common—until a well-guarded secret slips out, and everything changes.

So they start an arrangement. As the pressure leading to the Olympics heats up, so does their relationship. What was supposed to be a temporary, mutually satisfying fling becomes harder to resist. And as Scarlett realizes that staying away from Lukas is impossible, she finds herself treading into dangerous waters...