When tragedy strikes across the ocean, Ellie Lerner drops everything—her marriage, her job, her life in the Boston suburbs—to travel to London and pick up the pieces of her best friend Lucy’s life. While Lucy’s husband, Greg, retreats into himself, his and Lucy’s eight-year-old daughter, Sophie, has simply stopped speaking. Desperate to help Sophie, Ellie turns to a book that gave her comfort as a child, The Secret Garden. As its story of hurt, magic, and healing blooms around them, so, too, do Lucy’s secrets—some big, some small. Peeling back the layers of her friend’s life, Ellie is forced to confront her own as well: the marriage she left behind, the loss she’d hoped to escape. And suddenly Ellie’s carefully constructed existence is spinning out of control in a chain of events that will transform her life—and the lives of those around her—forever.