At Aintree Hospital's major trauma centre, a 15-strong team try to save the life of a young man who has arrived by emergency helicopter. He has been stabbed in the chest - one of three stabbings to arrive during the day. Across the city at the Royal Liverpool University Hospital, staff deal with a homeless man who has been returning for at least 18 years. He is always treated with patience and dignity and given somewhere to sleep his alcohol or substance misuse. However, his increasingly aggressive behaviour leads to him being issued with an ultimatum.