Following the heroes of the Helicopter Emergency Medical Service (HEMS) and the UK's leading trauma centre, the Royal London Hospital in Whitechapel, the series shows the split-second decisions doctors and paramedics make that can mean the difference between life and death. Each episode offers a rare insight into the Trauma Doctors' thoughts and decision-making process using a unique ‘inner monologue’ technique, giving viewers a glimpse into the life of the individuals who are at the sharp end of advanced medical procedure at the roadside and in the trauma bays.