A tragic accident. A misguided accusation. Are some mistakes unforgivable?England, 1889. In her family’s rambling manor house in Dorset, fifteen-year-old Theodora Hallewell dreams of magic, adventure, and Toby Meriwether. As Toby prepares to leave for university, Theo plans a midnight gathering—one last chance to make Toby notice her. By dawn, a tragic mistake will shatter the world as they know it. Years later, Toby has built a respectable life in London, scarred by the past but determined to put it behind him. Theo, struggling with the aftermath of what happened, has begun to fear that the life she has built is more fragile—and far more dangerous—than she ever imagined. Both live under the shadow of that fateful night—until a startling discovery casts what happened in a whole new light, and offers a chance to right the wrongs that have haunted them for so long. Spanning three decades, The Promise of Wonder is a spellbinding story of lost love, atonement, and the long journey towards forgiveness.