A young Mum dies after attending a local dance music festival. After it's established she has taken ecstasy, the team must investigate whether the drug was the primary cause of her death or if other factors played a significant role. With her family devastated and her partner trying to cope with what has happened, the investigation throws up serious questions about the provision of water at the festival and whether that had any part to play in this unexplained death. The coroner calls upon Dr Mark Clayton as an expert witness to broaden the inquiry.Also in this edition, a man is found in his flat having been dead for a considerable time. With no immediate identification available, and no clues to family of friends the team must conduct advanced fingerprint and DNA testing to confirm the identity of the deceased, as well as determine how he died.