Oli and Joe are identical twins. But they will never be the same.

Beth Truman gives birth to her sons at thirty-three weeks, then checks out of the maternity hospital with them and leaves her old life behind.

From the start, the differences between the twins are clear. Oli is bigger, stronger, healthier. Joe is small and weak, his future inexorably altered by the trauma of his birth.

By the time the boys are grown, Beth has a new name and a thriving business, and has successfully raised her sons alone.

But when the truth about their past emerges, Oli and Joe will be forced reassess everything they thought they knew about their mother, their upbringing and themselves.