You, your sister and the boys jump off the boat and move through the shadowy sewer tunnels, working your way around the corners and through the junctions back under the Houses of Parliament. Holmes ducks around a corner then stops. You, Irene and Watson flank him, standing in the shadows. You and the others look down the long tunnel and see some of Blackwood's thugs patrol the area.
In the center, is a device, a black glass cylinder housed in a metal cradle with electrodes on either side. It sits below a shattered ceiling, bricks dismantled, exposing a ventilation pipe. Holmes looks over at you three and whispered. "Behold, Blackwood's magic revealed."
"What does it do?" You asked, quietly.
"It's a chemical weapon. The first of its kind." Holmes replied.
"You deduced that, how?" Watson asked him.
"From my pocket." Holmes replied and he pulls out a rat tail from his pocket and shows you three.
"I snipped this off a rather common rat at the slaughterhouse. Notice the blue discoloration. The faintest smell of almonds, tell-tale traces of cyanide." Holmes said.
"Now we know what the ginger midget was working on." You said.
"It will revolutionize warfare." replied Irene.
"Yes, killing a lot of people." Holmes said as Watson looks at his watch.
"Now, there's seven minutes until noon. What are we going to do?" Watson asked.
"We must do this carefully...." Holmes begins to say until Irene runs off and shoots at the thugs.
"She loves an entrance, your sister." Watson said.
"She was always dramatic." You said as you and the boys hurry over, you and Watson begin to fire at the thugs as well.
Holmes fights one in hand to hand combat and Irene kicks one in the throat and walks up to the device. A thug comes up on Watson and begins to hit him with a stick and Watson fights back, another thug comes up and was about to hit him but you come up behind the thugs and kick the back of his knee
Irene looks over the odd object but she looks over and sees Holmes having trouble fighting a man, she sighs and raises her gun and fires and hits the man in the shoulder, the man doubles over and Holmes knocks him out.
While you and Watson continue to fight the two thugs, Irene and Holmes look over the odd device "I've never seen anything like it. Look at this." Irene said and she holds up a coin, puts it up close to the coil of the device and the coin gets fringed off to the side and hits a pipe.
"Its specifically designed to prevent us from disarming it. These components appear to be designed to receive a signal of some sort." Holmes said.
"Electromagnetic waves?" Irene asked while Watson removes his sword from his cane and slices it at one of the thugs as you get slammed up against the wall by one of the thugs and you raise your hand and slice your fingernails across the man's face and he screams out as you kick him away from you.
"When triggered, the electrodes will send a charge converting the chemical into gas. The gas will travel up that shaft and filter through the ventilation system that leads directly to parliament. Within seconds of its administration the most powerful men in the world will be choking on death. Blackwood must have some sort of transmitter that connects with it remotely." Holmes said as he looks around on the device then he looks down at his watch and said. "Three minutes and ten seconds."
Finally, you and Watson get control of the thugs by Watson firing at their feet and yelling at them and you kick one of them out. "Move it! Move it!" Watson shouted.

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Sherlock Holmes (RDJ Sherlock x Female!Reader)
FanfictionThe hangman did his job, Dr Watson declared the condemned man dead....and yet Lord Blackwood has emerged from the tomb to assert his deadly will over London. Is he in league with the forces of hell itself? It's a mystery macabre and only Sherlock Ho...