A busy Friday night shift ends in tragedy after two children involved in a car accident die shortly after their arrival at the hospital. The situation is intensified when Cathy discovers that the police officers who were first on the scene have misidentified one of the casualties. Meanwhile, Mike and Stella come head to head over his parenting skills, Robert struggles to juggle life as a single parent, Andrew offers to help David with a difficult young patient, and Louise and Stuart finally put their cards on the table.