A/N: This idea came to me after rewatching The Tholian Web episode... and then it kinda evolved from there. I think. Rated T for violence - if you like the boys going through the wringer, you've come to the right place! Please read and review!

"Evasive manoeuvres, Mr Sulu."

"Aye, sir."

Kirk bit his lip, his eyes fixed rigidly on the viewscreen. They were travelling through the roughest part of the Solymus Belt, and a magnetic storm had suddenly encircled them, making progress increasingly dangerous. Although he didn't let anything show, Kirk was worried. Both for the 430 lives under his command, and for his First Officer, who was at that moment lying in a Vulcan healing trance as he recovered from serious injuries sustained on the previous planetside mission. He knew McCoy had done all he could, and he was confident in his friend. It was now up to Spock's own physiology to repair the damage.

A blow rocked the ship, and Kirk turned to his communications officer. "Lieutenant Uhura, open a ship-wide comm." Uhura acknowledged his order, her hands flying nimbly across the controls. Kirk cleared his throat. "All hands, this is the Captain. We are currently passing through a magnetic storm in the Solymus Belt, and are experiencing some turbulence. I advise finding a stable position, and ceasing any work that requires precision. Don't be alarmed, and remain calm. Kirk out." He glanced at Scott, who was hunched over the Engineering console. "I think I know how those airline pilots from a few centuries ago must have felt, Scotty."

Scott laughed, and stood up, stretching his back. "Aye, Captain. This wee storm is ferocious, for sure."

The intercom on Kirk's chair whistled, and he pressed the button with his fist. "Kirk here."

"Jim, have you finished doing somersaults with the ship? I'm elbow deep in a crewman's chest down here! This damn surgery's tricky enough without some lunatic throwing the ship around!" Kirk grinned. McCoy sounded pissed.

"I'll let you know, Bones. Sulu and I thought we might try a few barrel rolls, just for kicks."

There was a spluttering noise. "Why, you –"

Another asteroid smashed into the Enterprise's hull, and the ship staggered again, more violently this time. Everyone on the Bridge was thrown sideways, however Kirk managed to remain in his chair. As the ship lurched, Kirk heard a shout over the channel from Sickbay, followed by muffled cursing. "Christine, I need a bandage over here, NOW!" There was a crash, followed by running footsteps.

"Everything okay, Bones?" Kirk asked.

"Give me a minute, Jim, I've just put a… a scalpel through my hand." McCoy sounded shocked, his voice tight with pain. "M'Benga, I need you to take over on Crewman Phillips. I'll –"

The line went dead.

Kirk gripped the armrests of his chair tightly. At the helm, Chekov exchanged a horrified glance with Sulu. Kirk wanted desperately to go and see McCoy, to make sure he was alright, but he knew he had to remain in command of the Bridge in a situation like this.

"Scotty, how are our shields doing?"

"They're holding, Captain," the Scotsman replied. "84 percent. But sir – if we're hit by many more of these rocks, we'll lose our shields faster than they can recharge!"

Kirk sat back in his chair, crossing one leg over the other, and resting his chin on his fist. "Then I believe we'll have to blast our way through this, Mr Scott. Lieutenant Uhura," he turned again to his communications officer. "Put the ship on Red Alert."

"Aye, sir."

The klaxon immediately began its shrill wailing.

"Helm, systematically fire phasers at will, aiming at all debris in our path."

Sulu and Chekov acted as one, locking co-ordinates and firing in unison. Twin beams of blue light shot through the blackness of space, picking out the masses of rock that hurtled towards the Enterprise through the storm. For all their efforts, however, asteroids still slipped through their defences, striking the ship from every angle.

"Shields at 70 percent and dropping, Captain."

"Acknowledged, Mr Scott."

Uhura's voice cut in over the scream of the klaxon. "Captain, I'm receiving damage reports from Decks 9, 14, and 15. Minor burns in Life Sciences Department."

"Have medical teams dispatched to affected areas, Lieutenant." Kirk's jaw clenched fiercely at the recollection of McCoy's agonised yell.

Without warning, a mass larger than the Enterprise appeared on the viewscreen, completely filling it with its proximity. Chekov yelled in alarm, pushing back in his chair. Sulu let out a hiss of surprise, jerking bolt upright and tightening his grip on the helm. Even Kirk flinched at how close the object was, feeling the muscles in his back contract.

It was light grey in colour, and resembled two large hoops of a similar size that rotated slowly inside each other. It glowed brightly with an unknown energy source, and Kirk's eyes widened as he realised that they wouldn't be able to navigate around it in time. He also recognised that it could be a vessel containing sentient life, and the use of phasers was therefore not a viable option. The Enterprise also couldn't stop, or reverse thrusters, as the warp trail they had created through the storm would collapse, and the debris would crush them.

It was one of those split-second decisions that every starship captain has to make, usually several times during their career.

"Mr Sulu, steady as she goes," he snapped out. Sulu turned slightly, his expression one of bewilderment. "Sir?" Kirk was balanced on the front of his chair, eyes locked intensely on the viewscreen. His position radiated a commanding tension and vitality, and he didn't break eye contact with the image as he responded to Sulu. "Continue on present course, Mr Sulu, warp five."

The helmsman complied immediately, without question.

Scott turned in his chair. "Captain, there's no way around that thing!"

"I know there's no way around it, Scotty. That's why we're going through it," Kirk replied patiently.

"Are ye out o' yer mind, sir? We'll smash into it!" Scott's eyes were wide.

"No, we won't. Continue watching your console for power fluctuations, Engineer." Kirk's voice was crisp, but not harsh.

"Aye, Captain." Scott rotated to face his console again.

Steadily, the distance closed between the Enterprise and the glowing object, until all that filled the viewscreen was a blinding white light. Kirk had his eyes screwed almost shut, but still he kept his gaze fixed on the unknown object that loomed before them.

Small asteroids continued to crash against the ship's hull, but they were nothing as large as what had been hitting them previously.

"Brace for possible impact," Kirk called sharply.

Almost at once, the ship gave a tremendous shudder, and Kirk was nearly thrown out of his seat. Around him, he heard shouts and crashes as his crew were flung to the ground. He was about to check if there was anyone injured, when the ship suddenly gave another forceful tremor, and Kirk himself was pitched forward. His head struck something hard, and darkness enveloped him.