Title: Security Breach

Summary: Eren and his two partners in crime legally rob vaults for a living. Keyword: legally. He was hoping for a change of pace, but murder, conspiracy, and an irritable detective were not what he had in mind. Modern!AU, Crime!AU, Riren (Levi/Eren)

Pairing: Levi x Eren

Warning: I know almost NOTHING about law, criminology, vaults, engineering, or pretty much anything in this story…

A/N: I should be working on Escape Artist, but I got sucked into Attack of Titans/Shingeki no Kyojin. I'm sorry!

Disclaimer: I don't own Shingeki no Kyojin.

_..._

Chapter 1: Prologue - Robbed

Gloved fingers carefully but quickly eased the heavy box halfway out of its 10-inch x 3-inch x 22-inch slot in the wall. The hand reached in to remove a heavy, rectangular package neatly wrapped in brown paper. After stuffing the package securely in his backpack, the man in sleek, dark-gray attire smoothly slid the box back into the slot and swung the metal flap shut, a light click indicating the automatic lock sliding back into place. He checked his watch as he twisted the small golden key out of the keyhole before glancing up at the surveillance camera in the corner of the open room and flashing his fingers through several quick hand signs. Half a second later, the great circular door slowly clanked open with a quiet woosh of air being sucked out, and the man padded silently across the tiled floor. He stilled at the door, not touching or reaching past the thick, shiny frame, impatiently waiting for a signal.

Hurry, 21 seconds left, he thought.

When there was a gap wide enough for two men to walk through side-by-side, he heard an almost inaudible buzz indicating the lasers being disabled. He moved without hesitation, nimbly dashing through the opening and stopped right outside.

17 seconds left.

Suppressing the urge to tap his foot, he waited again, this time in front of a partially dismantled keypad embedded in the wall, as the door reversed its direction without prompting and sunk back into place with an echoing thud. The handheld touchscreen device he whipped out was missing its back cover and had a short, rubber-coated cable dangling from inside. He pressed the fake fingerprint on his gloved left ring finger to the screen, punched in an 11-digit number into the wall keypad, and hastily but carefully lifted the keys to reveal the green motherboard. He lightly detached the cable connecting the keys. Pinching the end of the cable dangling from his handheld device, he plugged it into the now empty slot. The moment the electrical current connected, long familiar lines of binary 0's and 1's flooded across both the touchscreen and keypad display, manipulating the intricate locks to settle back in place with a resounding clank. Tense seconds ticked by as the 0's and 1's continued to flicker. Suddenly, both displays blanked and the light in the hall dimmed.

Glancing down at his watch again, the man breathed out a shuddering sigh of relief. 3 seconds before forced lockdown. Just made it.

Now he had as much time as he needed to put everything back in place, return the handheld device to its dock in the security room and meet up with his ops partner, as long as he passed back through the weight-sensitive tiles, moving lasers, four second-shift security guards, and another encrypted door without detection. Mikasa is definitely running the next assignment. This stress is bad for my heart.

_..._

Climbing into the back of the van with a tired groan, Eren tossed the textbook-sized object to his other partner in crime – it was just that, a textbook. Under the brown wrapping was a thick, worn hardcover textbook teaching the industrial applications of programmable language controllers, one of the books Armin had studied years ago to become a critical part of their three-man vault-breaking team.

Armin caught the book with a quiet 'omph' and sent his best friend a sympathetic look. "Good job, Eren. We cut it close this time, but it was a near-perfect bank heist. Let me pull out of their system and then we can head out."

"Thanks for the backup. Seems like your binary code breaker got faster." Eren ungloved a hand and rubbed his face roughly, letting out a tired sigh. "You know, this job would be so much more satisfying if we actually got to steal something worthwhile." Mikasa, who had slipped into the van behind her brother in time to hear his recurring complaint, hid the upward quirk of her lips as she wrapped her red scarf back around her neck.

"Hey! This book is worth its weight in gold. It may be a little out of date, but it's one of the best textbooks on logic ladders. I still reference it when I design new vault systems," the blond-haired man defended steadfastly.

"Yeah, yeah, I know. I read it too." Eren shot over a fond grin. "Just do your genius computer thing and let's get out of here. We still have to report in before we get to go home. I'm starving and I wanna get paid."

_..._

On the other side of the city of Sina, the sharp ringing of a generic ringtone sliced through the silent apartment bedroom. A lump in the wide bed growled as a hand shot out to snatch the offending phone from the nightstand. It let out a curse as the caller ID flashed his superior's name.

"What the fuck is your goddamned problem?"

"Is that any way to greet your friend, Levi?"

"You're not a friend when you wake me at 4 fuckin' AM. What do you want, Erwin?"

A tired sigh could be heard from the other end of the phone. "We just received a call about a vault robbery. The Grand Hermiha Casino was robbed of-"

Levi cut him off sharply, "Cut to the chase. You wouldn't call me for a simple burglary."

Erwin chuckled, "Sharp as always. They left a string of bodies and an additional safe was emptied. Come to the station and I'll explain in further detail."

Levi sat up with a groan. "Can't criminals get their fix during proper business hours? I'm going to rip them a new one when I get my hands them." He hung up without waiting for a reply and considered sliding back under the covers for another five minutes but paused when the phone chimed. The message that appeared on the screen read, Don't fall back asleep.

With an irritated click of the tongue, Levi typed a response: Coffee better be ready. The good kind or I'll wax your eyebrows.

_..._

A/N: My first SnK fic! What do you think? This is hopefully going to be a thrilling one.

November 5, 2015