Nina and Léo bring a young woman to the hospital who has just given birth in the street and her baby is in a bad way. An incident disrupts the internal medicine unit.
Nina confronts Dr Proust about a patient who has come to spend his final days in hospital, away from his mother. The pediatrics department is concerned over a potential case of meningitis.
When the department is overwhelmed by a flu epidemic, Nina crosses paths with an old friend. Léo looks after a diabetic patient who has passed out on his wedding day.
Nina becomes attached to a patient who Dr Proust has developed a casual attitude towards. Léo, her adviser and housemate, becomes fond of a very religious patient.
When her father is urgently taken to hospital, Nina puts on her white coat to stay at his bedside and finds herself looking after a man accused of domestic violence.
Nina saves the life of a surgeon who she catches in the act with a student nurse. She covers for the young woman but in doing so, she ends up looking like the mistress.