Neil and Jack arrive at Sgt. Hugh's to speak to suspect Roland O'Brien, only to walk right into the middle of a hostage situation – finding themselves being tied up in the boiler room by O'Brien's deranged son. Adam arrives to take charge of the situation, and assigns Jo to be the negotiator in the absence of the hostage negotiation team. Jo attempts to use O'Brien's ex-girlfriend, who is now carrying his baby, in an attempt to secure Roger's safety. Meanwhile, Steve sees red and rescues Honey from the clutches of O'Brien's other son, wrestling him to the floor. When Roger attempts to obtain medical help for Roland, he gets into a tussle with his son, and the gun fires, injuring the boy.