It would probably be best to have some knowledge of the Dark Brotherhood in Oblivion to understand what's going on here. I don't own the Elder Scrolls in any way.
"What have you done..?" I heard behind me as I crouched down low in the grass, my bow still in my hands. "I thought I could get here in time, that I could stop you!" I turned around to face the man, my Speaker, Lucien Lachance, my wide eyes meeting his furious ones. "I'm here to end your miserable life..but.." his eyes began to soften their glare "I sense confusion. You have no idea what I'm talking about, do you?"
I stood up from my crouched position and replied, still in shock "No, Speaker. Whats going on?" Lucien pointed to the man lying dead before the Lucky Old Lady statue, an arrow in his skull. "Do you know who you've just murdered?" and I replied once more "No, Speaker. I was given your specific instructions in my Dead Drop to take his life." Lucien looked at me calmly and said "Let me see your contract."
I took out the envelope from the pocket of my uniform and handed it over to him. Lucien slipped the paper out and took one look at it "This isn't my handwriting." he said. "What?" I asked, my mind racing back to the thought of my first Dead Drop. The Speaker's handwriting was neat and almost blocky in a way, but the writing on the paper was messy chickenscratch. "It...it isn't.." I stated "Then, who's writing is it, and who in the Void have I been killing?!"
"You followed my orders in the beginning, as expected, by taking the lives of the Draconis family, but after that, someone must have begun to switch your contracts. You've been systematically killing off the members of the Black Hand. J'ghasta, Alval Uvani, Shaleez, Havilstein Hoar-Blood." Lucien listed off several members of the Black Hand. I fell down to my knees as I heard this information, more shocked than I'd ever been in my life. "There's no time for that, Silencer!" the Speaker said, grabbing under my arms and forcing me to my feet. "I'm being hunted by the remainder of the Black Hand as we speak. They think I'm the traitor!"
"What should we do?" I asked, looking for guidance. "I'm going to go into hiding at Applewatch. It's safe there, and Fort Farragut is no longer secure. The best thing for you to do now would be to go to the location of your next Dead Drop, a barrel behind the statue in Anvil, and wait for the traitor to come." He replied. The Speaker always seemed to know what to do in a tight situation, but something didn't seem right.
"I'd rather you come with me to Anvil." I mumbled, trying not to disrespect his plan. "And why is that?" Lucien asked. "Because the Black Hand probably knows you're looking for somewhere safe to hide out, since you haven't been back to Fort Farragut. Applewatch seems like the best place to hide, because it's empty and not in any town, but the Black Hand is sure to be keeping an eye on it, along with all the other homes where my contracts took place." I explained.
Lucien looked mildly surprised at my long explanation, before he nodded "You have a point, Silencer. It would most likely be best for me to remain on the move, so I will accompany you to Anvil."