When the mutilated corpse of a young man is found in a beach apartment in Bondi, Tori Lustigman and Nick Manning are assigned to the case. Is this a brutal murder, did a robbery go wrong, or is it a gay hate crime? As other ritualistic murders take place, the detectives discover that the killer is using the 'THRUSTR' app to track his victims. Every local user of this app is now in danger and it becomes a race against time to catch the serial killer before he strikes again.