When Jenny Shaw hears someone shout “Jessie!” across a hotel lobby, she impulsively answers. All her life, Jenny has toed the line, but something propels her to seize the opportunity to become Jessie Morgan, a woman to whom she bears an uncanny resemblance. Lonely in her own life, Jenny is embraced by Jessie’s warm circle of friends—and finds unexpected romance. But when she delves into Jessie’s past, Jenny discovers a secret that spurs her to take another leap into the unknown.