Detective Tori Lustigman (Yael Stone) is partnered with Nick Manning (Noah Taylor) to investigate a brutal murder, only to discover a series of eerily similar cold cases one of whom may have been her brother, Shane. Much to the frustration of her boss Inspector Peel (William McInnes), Tori digs deeper only to have their current investigation compromised, resulting in a hostage situation and a fatal error of judgement.

As Nick prepares to face the Critical Incident Investigation Team, another body is discovered with the same hallmarks, confirming that the dating App THRUSTR is being used to lure victims. With evidence that former football legend Christopher Toohey (Ben Oxenbould) has links to the past crimes, Nick and Tori go to extraordinary lengths to persuade him to talk with tragic consequences.

Reeling with guilt, Nick and Tori investigate the death of Toohey and his past links to the Pointers gang. With the THRUSTR killer still on the prowl, Crime Scene Officer Brenda (Danielle Cormack) discovers DNA which not only confirms Tori's suspicions about her brothers murder - but puts ex-gang member, now local businessman, Hammers Hampton (Craig McLachlan) firmly in the spotlight. Confiding in Oscar (Jeremy Lindsay Taylor), Tori doesn't realise he will be hell-bent on revenge, and make a dangerous attempt to take matters into his own hands.

With Oscar surviving a brutal attack, Nick and Tori desperately reach back into the past and discover a vital lead previously masked by dodgy detective work. Despite a confession by Hammers the THRUSTR killer is still out there - he has taken another victim and now he is going after Oscar.

Roz deals with the trauma of her attack, while Lisa tries to fix her marriage. With her daughter's return, Kate struggles to keep her web of lies intact.

Kate refuses to lose her husband, Lisa struggles to find her way back to hers, and Roz decides it's time to tell the truth.