Olive Barstow had been in Matha Boyle's class until she was killed by a hit-and-run driver while riding her bicycle. Then Martha finds out that Olive, a girl she never really knew, wrote in her journal about wanting to be friends with Martha, and wanting to be a writer. Martha can't stop thinking about Olive, even when she goes on vacation to stay with her grandmother by ocean with her family. In the midst of experiencing first love, loneliness, embarrassment and fears of her beloved grandmother growing old, Martha allows Olive's death to teach her lessons about living.