Gib Finney, given a device that will let him erase mistakes from the past, is not sure which event from the worst day of his life he should change in order to keep his sister from being hit by a truck.
When he is given a device that will allow him to "undo" what has happened in the past, Gib Finney is not sure what event from the worst day in his life he should change in order to keep his sister from being hit by a truck.
