Roy and Bella investigate a murder on a council estate after ateenager is stabbed to death , with signs initially pointingto it being drug-related, but the victim's parents are adamantthat their son had nothing to do with drugs. The investigationbrings Grace face to face with someone from his past and stirsup old demons that worry Bella, with the case placing one ofthe team in grave danger. Meanwhile, Branson's investigationinto a masked armed robbery leads to tensions in CID.
