Chapter Text
221B Baker Street smelled faintly of burnt toast and chemicals that John had learned not to ask about.
Mrs. Hudson stood in the doorway, hands on her hips. “Whatever it was this time, it’s not coming out of your deposit.”
“It was an experiment,” Sherlock said absently, eyes locked on his laptop. “And a successful one.”
John glanced at the blackened patch on the wall. “By whose definition?”
“There’s a man downstairs,” Mrs. Hudson continued. “He says he’s being blackmailed, he’s very important, and he’s crying.”
Sherlock finally looked up. “Important people don’t cry in stairwells.”
“He’s doing both,” she replied crisply.
-
The man turned out to be an MP, backbench, forgettable, sweating through his suit. He clutched his phone like it might detonate.
“He knows things,” the MP whispered. “Things from years ago. Files that were sealed. Conversations that never happened.”
Sherlock took the phone, skimmed the messages, and handed it back.
“Blackmail,” he said. “Clumsy, but ambitious.”
“Ambitious?” John echoed.
“Yes,” Sherlock replied. “He’s not asking for money. He’s asking for obedience.”
The MP stared. “What does this mean?”
Sherlock didn’t answer. His attention returned to his laptop, completely ignoring the man’s continued existence.
John sighed and looked at the miserable MP. “You can leave it to us now. We’ll contact you if we need anything else.”
The man rose from his chair quickly, muttering his thanks to both men before hurrying out.
As the door clicked shut behind him, John turned to Sherlock, concern etching his features. “Poor bloke’s terrified. What now?”
“Now we dig,” Sherlock said.
John watched as Sherlock immersed himself, fingers blurring over the keys, cross-referencing the threats against public records, tracing faint digital footprints through old hacker forums and leaked databases.
Hours slipped by in tense silence, broken only by Sherlock’s occasional mutters.
John busied himself with tea, feeling the weight of anticipation, but Sherlock’s focus never wavered. He linked disparate clues: access patterns that screamed restricted intelligence, the kind only agencies like MI5 or MI6 could provide.
“John,” Sherlock said at last, his voice edged with triumphant excitement, though fatigue shadowed his eyes. “The data spans precisely 2000 to 2005. Nothing beyond. Systems evolved after that, enhanced firewalls, digital overhauls. Whoever gathered this had high-level access then, but it was severed. Cut off clean.”
John leaned in, a mix of admiration and worry stirring. “So the blackmailer gathered the intel a long time ago. But why didn’t he use it back then? Why use it now?”
“Not ‘gathered’, inherited” Sherlock corrected, irritation flashing briefly before giving way to revelation. “He isn’t the one who collected the data in the first place. He got it recently; that’s why he didn’t act earlier. What makes it worse is that he lacks expertise. Look at the demands. sloppy. No understanding of modern encryption or cross-system integration. He doesn’t know how the original systems operated; he’s just wielding the fruits. Smart, perhaps, but not brilliant.”
“You said he wants obedience from the MP, not money,” John said slowly. “So he’s testing whether he’s doing it right?”
“Exactly, John.” Sherlock clapped his hands together. “He’s testing his technique on easier targets, then moving up gradually. But with his current methods, he won’t get far. His scheme wouldn’t survive retaliation from bigger names. Imagine blackmailing a cabinet minister, they’d counter-blackmail, make problems vanish, or worse… eliminate him entirely.”
Sherlock didn’t stop there. His mind fully engaged, he turned to tracking the blackmailer. He dissected the messages further, noting subtle IP echoes buried in the metadata, bounced through proxies, but not perfectly.
“Sloppy,” he muttered, cross-checking against utility records and anonymous server rentals across London.
A pattern emerged: payments traced to a shell account, linked to a forgotten warehouse lease in the East End.
“Recent activity. power surges for servers, no legitimate business. Too quiet. Too clean.”
He slammed the laptop shut, urgency sparking in his eyes. “That’s our lair. We’re going in. Now.”
—-
The warehouse in the East End loomed under a drizzling twilight, its façade weathered, the padlock conspicuously new, the windows blacked out with precision.
Sherlock picked the lock with deft fingers while John kept watch, his heart pounding as it had in his army days. A faint hum of electronics seeped through the walls, the scent of ozone sharpening his senses.
They slipped inside, shadows merging with the gloom. Servers lined the walls, blinking like watchful eyes. Files lay stacked neatly on tables.
A figure moved in the dim light, the blackmailer, mid-forties and utterly ordinary, startled by their intrusion. He fumbled for a gun hidden in a drawer, panic flashing in his eyes.
Sherlock moved like lightning, knocking a stack of files into the man’s path. John lunged forward, military training kicking in, tackling him to the ground and wrenching the weapon away with a grunt.
The man struggled, snarling, but John pinned him firmly. “Stay down,” he growled, breath ragged.
Sherlock bound the man’s hands with a nearby cable, his own pulse racing from the close call. “Call Lestrade,” he said, voice steady but edged with relief. “Let the Yard handle the cleanup.”
As John dialed, Sherlock scanned the room. His sharp eyes halted on a lone USB drive amid the chaos, labeled neatly:
MYCROFT HOLMES.
Sherlock picked it up, turning it over thoughtfully.
He felt no fear. Only mild irritation.
A smile grew on his face
Mycroft was going to be so annoyed.
Sherlock could already picture the arched eyebrow, the terse phone call, the reluctant favors extracted as leverage. The snark would fly like arrows.
He slipped the USB into his pocket.
After all, if his brother was hiding something, Sherlock intended to enjoy uncovering it.
He had no idea what he was about to find.