Cara's world broke when her younger brother, Si, died in a car crash. Three months later, she's trying to find her way back, when she meets Nathan. Gorgeous, smart and kind, she feels a freedom when she's with him. But he's hiding a huge secret. His world broke three months ago too - when he ran a red light and killed a boy. There's no way Cara and Nathan can be together. But, despite everything, they find it impossible to be apart. This is a stunningly written, thought-provoking drama about loss, atonement, and love which defines a lifetime.