A Scunthorpe restaurant worker is stabbed in the neck with a pair of scissors in broad daylight, and while the attacker flees into a residential area, the victim is rushed to hospital with life-threatening injuries. Police discover the victim knew the attacker and soon recover the bloodied scissors from the suspect's house - but as the net closes in, the case takes a surprising turn as witnesses suggest the victim may not have been acting in self-defence

A man is viciously attacked on his doorstep and although he fights off his aggressors he is left shaken and bloodied. Armed response police arrest four men found in nearby streets and the stakes are upped significantly when detectives recover an imitation police ID badge, a rental van and a knuckleduster, as well as other paraphernalia indicating this is a disturbing and premeditated assault. With the gang of suspected attackers giving little away in their custody interviews, police face an uphill battle, and it's a race against time to prove they have the right men in custody

In Scunthorpe, a household is terrorised in their home when five masked men break in and hold them at knifepoint before stealing their car. Detectives face the urgent task of identifying and capturing the suspects before they attack again. At the scene officers uncover crucial pieces of evidence left behind by the attackers - a used vape and a sledgehammer. CCTV footage also captures what appears to be a getaway vehicle - a lead that could provide a vital connection to the masked men. Police arrest their Suspect Number 1, but will he admit his role in the crime and implicate the other members?

With exclusive access to Humberside CID, this series reveals the meticulous work of detectives as they navigate their way through the twists and turns of an investigation, gathering the clues that could ultimately reveal the truth. In Grimsby, a vicious mass street brawl causes mayhem and leaves innocent victims with serious injuries in its wake - one person with a critical head wound. Police initially arrest three men but are then thrown into a desperate race against time to find their accomplices before one of them flees the UK to Romania.