She never heard the movement behind her, just caught a reek of stale sweat. And then the chain that was attached to her ankle was suddenly round her neck, choking her, and a triumphant voice was whispering in her ear, 'Found you.'

Bolt walked slowly down the track as it ran in a curve through the woodland and then straightened as the tree line ended and an old two-storey cottage in need of a lick of paint appeared in front of him, nestled between two ramshackle outbuildings. There were lights on downstairs and the double-gates that led to the front of the house were wide open. A dark-coloured Range Rover was parked in the driveway.

He moved off the driveway and on to the long grass lining it so that his movements didn't trigger any lights, and approached the gates quietly using the darkness as cover.

But as he reached them he heard the sound of footsteps on gravel coming from somewhere up ahead. His view of whoever it was was blocked by the Range Rover as he crouched down behind the fence so that he couldn't be seen.

Then he heard it. A strangled sob, definitely female. He felt a ferocious jolt of emotion that almost knocked him off his feet as he realized that it was almost certainly coming from Emma.

This was confirmed in the next few seconds when she came into view, barely a silhouette in the gloom and smaller than he'd imagined, staring straight ahead. But it was definitely Emma, just as Bolt knew that the man dragging her by the length of chain round her neck was Scott Ridgers. He might have been wearing a balaclava, but that didn't matter. It was him.

Bastard.

Ridgers had a small-bladed knife in his free hand which he kept close to Emma's side to ensure she didn't struggle. Even in the darkness, Bolt could see the terrified expression on her face, and he felt the rage build within him. But there were at least twenty yards between them, which would give Ridgers far too much time to react if Bolt charged him. He was going to have to be patient, look for an opportunity.

Then Ridgers said something to Emma that chilled Bolt's blood: 'We're going to have some fun now, baby.'

Emma managed a strangled sob, and Bolt had to shut his eyes and hold on to the fence for support.

When he opened them again, they'd reached the front door. He watched as Ridgers pushed it open and shoved Emma inside, following her in without looking round.

And chuckling. The bastard was actually chuckling.

He also made the biggest mistake of his life. He didn't shut the door behind him.

Bolt took a deep breath. Moving as quietly and swiftly as he could, he followed them into the house.

The chain round her neck was choking Emma so badly she could hardly breathe as he dragged her through the hallway. The cellar door was still open and he pushed her towards it.

Oh God, she couldn't go back in there again, not having come so close to freedom. And she knew that if she went back in, this time she definitely wouldn't be coming back out. Not alive, anyway. She went limp in his arms, and he cursed.

'Come on, move it,' he snapped, angry now, pressing the blade of a penknife he'd produced earlier against her ribs.

She stayed limp, and started to make horrible choking sounds, as if she was dying.

'If you're fooling me about…'

He let her drop to her knees and loosened the chain a little.

'Water,' she gasped.

'All right,' he said, hauling her to her feet and manhandling her through the hallway in the direction of the kitchen. 'You can have some water. Then we'll have some-'

He suddenly stopped as they reached the kitchen door and he switched on the light. She felt him go tense.

'Where is it? Where the fuck is it?'

He shoved her roughly inside, letting go of the chain and sending her sprawling to the floor.

'The bag!' he yelled, his voice filling the room. 'The bag with the fucking money! It was on here!' He pointed a gloved hand at the empty kitchen table. 'Where the hell is it?' He paced about inside the room, rubbing a hand over his face beneath the balaclava, his eyes wide and angry. 'I can't believe this. Someone's taken it. Someone's taken my money.' He stopped and slammed his hand down on the table, hitting it so hard the legs wobbled. 'My fucking money!' he roared at the ceiling.

Emma cowered, terrified, pushing herself into the corner of the room, away from his rage and frustration.

'I'm going to find whoever's done this,' he muttered. 'I'm going to find him now. And when I get hold of him…' He shoved the penknife he was holding back into the pocket of his jeans, then yanked open one of the drawers, took out a huge kitchen knife and ran a finger along the blade. 'When I get hold of him, I'm going to fillet the bastard.'

He turned and pointed the knife at Emma. The blade shone in the glare of the overhead lights.

'Stay there, all right? Don't you dare move an inch if you ever want to see your mum again. OK?'

She nodded, trying not to sob. 'OK.'

He swung round and stormed out of the door, knife in hand.

And immediately cried out in surprise.

The next second he was flying back through the door with another man hanging on to him and shouting something that filled her with sudden and delirious relief: 'Armed police! Drop your weapon!'

But that was the problem. Bolt wasn't armed when he charged Scott Ridgers. He wasn't even carrying standard-issue pepper spray, which had been taken off him earlier. He had nothing but surprise. He grabbed Ridgers' wrists and twisted them away from his body, paying particular attention to the hand holding the kitchen knife, and trying to butt him as he'd done Marcus Richardson earlier that day. But the blow he caught Ridgers with as they both crashed into the kitchen barely glanced the other man, who had the good sense to move his head, and as they hit the kitchen table, disaster struck. Bolt lost his footing and slipped, sliding along the tiled floor on one knee, desperately trying to keep hold of his foe, even though his head was now only level with the other man's groin.

Ridgers was fast, and he took advantage of Bolt's plight to tug his wrists free and slam a knee into his face. A piercing, hot pain shot through Bolt's nose and he wobbled in his kneeling position, unable to react as Ridgers then lifted a leg and delivered an accurate kung-fu kick to the side of his head. This time he fell backwards, landing against something white and hard. His head throbbed savagely where Ridgers' boot had connected and he could feel the blood pouring out of his nostrils and on to his lips. He tried to focus through the pain, saw the huge knife in Ridgers' hand, and knew that he was helpless.

Jesus. After all this, he'd failed.

Then he saw Emma crouching in the corner of the room, her eyes wide with shock.

'Run, Emma!' he shouted. 'Run!'

Ridgers took a step forward, pointing the knife down at Bolt, ignoring Emma now. 'Where's my money?' he roared. 'Where's my fucking money?'

Bolt rolled on to his side, thinking fast, assessing his options… knowing full well that he didn't have any. Emma leapt to her feet, but instead of running for the door, she ran at Ridgers and sank her teeth into his knife arm, just above the elbow. He cried out but didn't relinquish his grip on the knife. Instead, he grabbed her by the hair and yanked her off in one movement, the force of his attack sending her crashing into one of the worktops.

Adrenalin born of pure rage shot through Bolt, briefly substituting the pain and dizziness. He started to get up.

But it was too late. Ridgers was bearing down on him, and there was murder in his eyes as he brought back his knife arm to deliver a blow that Bolt knew would not only end his life, but would mean the end of Emma's too.