Wife, mother, and hyper-driven, multitasking Sarah Nickerson, a 37-year-old Harvard Business School grad, is so controlled she limits her crying to five minutes twice a month behind her office desk. She travels to China on business, and still signs permission slips on time. Left Neglected, by Lisa Genova, discerningly chronicles Sarah both before and after a devastating brain injury blots out the left side of her world. Actor Sarah Paulson, always an incandescent force, narrates here with such disarming openness that Left Neglected — superficially about a preppy modern mommy of three finding grace through catastrophe — gathers enough texture to unfold a richly moving rebirth.

Left Neglected is easy to latch onto, largely because Paulson projects Sarah Nickerson as endearingly insecure and goofy. By pebbling her pre-car crash, pre-head trauma Sarah voice with urgency and strain, Paulson revs up pacing to mirror the choking rhythms of her character’s hurried schedule. Yet the recovering Sarah is looser and less uncensored as Paulson unknots her anxious cadences in a gradual fade. We relax around this Sarah who cracks pun-laced jokes with her rehab therapists and grieves as deeply for the skinny jeans she can no longer button at the waist, as having to relearn using the bathroom alone.

While Left Neglected is Sarah’s story, Paulson astutely rescues the ensemble players — Sarah’s jittery, apologetic mother Helen, and her innately decent husband Bob — from the fringes. She pitches Bob as honorable and magnetic in his own right, a cool guy whose empathy eventually collapses into panicked resentment as Sarah’s lost income capsizes the family finances. Helen, on the other hand, begs to be Sarah’s rock, atoning for her indifference the last 30 years. “My life can be fully lived with less,” Sarah observes, well into her healing journey. And for us, too, this reclaimed state of blessedness feels lasting and true. —Nita Rao