When Christmas shoppers board the 7.15am train to Bath Spa, they don't expect to never see their loved ones again.

When a co-ordinated terrorist attack derails the train, the passengers are left fighting for their lives.

For Andrej the train driver, Harald the Zimbabwean farmer and Oscar the war veteran travelling with his grandson, life will never be the same again.

As the manhunt for the terrorists begins, D I Gillian Marsh must act on her instincts to find the ones responsible for this tragic attack.