Librarian Willa McCourt loves her unconventional professional life driving and managing a bookmobile, bringing books and conversation to the outlying communities near Washington’s coast. But when a patron asks for help finding her missing brother, the case pulls Willa off her quiet coastal route and into danger. Willa’s solitude is invaded by a newbie cop assigned to ride shotgun to interview witnesses and keep Willa from taking the investigation entirely into her own hands.

State Patrol trooper Steph Douglas thought she’d left small town coastal Washington behind her almost two decades ago, but here she is again, hoping to finally figure out where she belongs. When a local man vanishes, a routine search quickly spirals into a potential homicide. With few leads and a community full of secrets, Steph reluctantly accepts Willa’s help, and her bookmobile becomes their base of operations.

As clues twist and turn and the case edges toward murder, Willa and Steph’s tentative friendship becomes an attraction they don’t expect or know how to handle. On roads where everyone is hiding something, trusting each other could be the most dangerous risk of all.