Sgt. June Ackland has discovered PC Cathy Bradford has barricaded herself and DC Brandon Kane's kids in the station's boiler room. When Cathy promises to release the kids in exchange for Brandon as a hostage, Insp. Gina Gold refuses, but Supt. Adam Okaro overrides her decision. Cathy insists Brandon must choose one child, but he manages to negotiate Zoe's release as well. Forcing Brandon to handcuff himself, Bradford relives the events of the past year, including the death of Brandon's wife Tanya. The station is evacuated, and the TSG arrive to provide support. Cathy's stories become increasingly unbelievable, as she tells Brandon that she was abducted by a serial killer as a child. DS Samanatha Nixon and DC Eva Sharpe trawl through Cathy's belongings and find that was not true. When Cathy moves Brandon out of range of the TSG probe, Okaro authorises TSG to force entry into the room. Brandon manages to overpower Cathy, but she lights a petrol fire intending to kill them both.