Smithy had started pacing his office. Callum hadn't called in for over two hours. There was no response from Nate's phone, so Smithy had sent Leon and Mel to check out Nate's flat. He hadn't heard back yet.

'Sierra Oscar 1 from 437, are you receiving, over?' Leon radioed in.

'Go ahead, 437.' Smithy grabbed his radio a little too eagerly, almost dropping it.

'We're at Nate's flat. The door's been forced and there's two patches of blood by the door. Nate's phone is here, but no sign of Stone, Nate or Lucy.' Leon reported.

'Alright. I'll send forensics to you. Seal the scene and don't let anyone in.' Smithy ordered.

Smithy pulled out his phone and made a call.

'Eddie, you need to get to Nate's flat. We've got a possible kidnap and there's two patches of blood at the scene. Call Leon and he'll give you the details.' Smithy explained, quickly hanging up.

Smithy pegged it out his office to IBO. He got into the suite with all the cameras. Smithy tried to figure out where they could have gone.

'Smithy, what's going on?' Sergeant Jo Masters entered IBO behind Smithy.

'Callum, Nate and Lucy are missing. Nate's flat has been broken into and there's two patches of blood. We don't know what's going on.' Smithy was worried.

'Has Callum not got his radio?'

'He's not been reached for about two hours. Something is wrong.'

'Sir, we've just had a report of a gunshot on one of the Estates.' PC Kirsty Knight chipped in.

'Where?' Smithy walked to Kirsty.

'Nayfield House.' Kirsty explained.

'Jo, take Ben with you and some backup. We want them found soon as.' Smithy took control.

Jo dashed out the room, almost knocking over CID officers getting in the way.

'Where's the fire?' DS Max Carter laughed.

'We've got two missing officers, Max! So pull your head out your arse and go help Smithy!' Jo yelled back at him.

Jo nearly stumbled down the stairs, but she caught her balance and nearly headbutted PC Ben Gayle for her trouble.

'Ben, you're with me. We have to go to Nayfield House. We think that's where Stone and Nate are.' Jo explained.

Ben nodded and joined Jo leaving the nick. Other officers followed, getting their instructions on the radio from Smithy. They got into their vehicles and drove out the yard, Jo's vehicle leading.

'What do we know, Sarge?' Ben asked.

'Stone left the nick two hours ago to check on Nate and Lucy. We had no contact since he arrived at the flat. Leon and Mel went to check it out and found patches of blood. Eddie's checking them now. There was no sign of any of them. Kirsty then got the information a gunshot has been heard by Nayfield House. That's where we're going to make sure everyone is safe.' Jo started gripping the wheel tighter.

'You think anyone's hurt?'

'I don't know. We have no idea what the situation is.'

Jo screeched the car round the corner, the sirens and lights active at full pelt. Ben didn't dare ask any more questions, seeing the concentration on Jo's face. The vehicles drove through London until they reached the estate with Nayfield House ahead of them. They all parked up and got out, ready to move. Two vans followed them and the armed police filed out, ready for anything.

'Jo, do we know which flat the gunshot came from?' Ben asked.

Jo grabbed her radio, pulling it towards her mouth.

'Sierra Oscar 1 from 46, is there any indication which flat the gunshot came from, over?' Jo hoped they had some clue.

'Sierra Oscar 46 from 1, there's been a couple of calls about flat 37. Screaming has been heard from inside, over.' Smithy gave the news they needed.

'Flat 37 it is.' Jo looked to the armed officers.

The armed officers got ready, deciding on the right cause of action. They all got their weapons ready to storm the block. Jo pulled out a folder from the boot of her car. She took the folder to the armed officers.

'The two men in this file are our officers. The woman is a victim and training officer.' Jo handed the file over.

The officers took in the mugshots of Callum, Nate and Lucy. Jo started to get fidgety, unsure how it was going to go. Another police car pulled up, Leon and Mel getting out.

'Sarge, Eddie got a match on the blood samples. They're Lucy's and Stone's.' Leon reported.

'Okay. We need to raid that flat.' Jo looked to the armed officers.

'We'll need the go ahead from your Inspector.' The ranked armed officer explained.

Another gunshot rang through the estate. All the officers froze, recognising the direction of the noise came from the same direction flat 37 Nayfield House was in.

'We'll get ready to go.' The ranked armed officer stayed firm.

'Sierra Oscar 1 from 46, armed response want your go ahead to approach the flat. We've just had another gunshot from the same direction, over.' Jo called in to Smithy.

The ranked armed officer walked to Jo, about to speak to her.

'Sierra Oscar 46 from 1, you have permission to go into the flat, over.' Smithy radioed in.

'We're ready to go.' The ranked armed officer nodded.

Jo made a gesture for the uniformed officers standing around to follow the armed officers towards the flat. The officers followed in a little bit of a rabble, unsure what they were going to find.

The officers marched up the stairs at some pace, trying to stay calm in the fragile situation. They got to the walkway and found flat 37. The officers collected round the door, the armed officers in position. An officer knocked on the front door.

'POLICE! OPEN UP!' The officer by the front door yelled.

There was no response. The officers looked at each other. One of the officers by the door had what was known as the big red key, the way to force the door open. The officer with the big red key gripped onto the metal device and stood side-on to the door, swinging the flat circular metalhead into the door where the door lock would've been. The door swung open, slamming into the wall behind it.

The officers piled into the flat, guns up and aimed.

'ARMED POLICE! ARMED POLICE!' The officers called.

Jo led the officers into the flat, not sure what she'd find inside.

'STAY WHERE YOU ARE! STAY WHERE YOU ARE!' Two separate officers were yelling from two ends of the flat.

Jo dashed in and got Leon to go right, checking who they had a gun aimed at. Jo went left and found two chunky blokes on their knees, their hands behind their heads. They caught sight of Jo and their faces snarled up, not liking the look of her at all.

'Sarge!' Leon called, a tremor of fear in his voice.

Jo ran out the room and went the way she had told Leon to go. She entered the open space to find Callum kneeling on the floor. Nate was coughing bits of blood by the wall. Two more bulky blokes were in the room on their knees. Another bloke was being restrained by armed Police. It was Raheem Woods, blood on his hands and clothes.

It was only then that Jo saw why. Callum wasn't kneeling on the floor for the fun of it or because he had a gun pointed at him. Nate wasn't massively shaken up because he was coughing up bits of blood.

All officers were worried by what Callum was trying to do. He wasn't staying still. He was trying not to give in again.

Callum Stone was trying to do CPR to a female body with a gunshot wound to the stomach. Jo froze as she caught sight of the female's face.

The gunshot victim was Lucy Roberts.