One machine. One lost love. One choice that changes more lives than anyone can count.
Dr. Amelia Harlan has spent eight years building the Chrona Aperture, a device capable of bringing two moments in time dangerously close. She promises the world observation, evidence, and restraint. During the first transit, however, instinct overrides protocol. Amelia pulls a stranger away from a cart wheel-and a rescue lasting only seconds begins to rearrange families, streets, institutions, and memories. Then Bellweather starts remembering lives it never lived. A woman in a blue coat arrives with impossible evidence from futures that should not exist. A cracked watch suggests that Tomas Reed-the man Amelia loved and lost-may still be alive in another version of the world. Every new possibility sharpens the temptation to correct the past. Every correction hides a cost someone else may be forced to carry.