dark alley'kidnapped"

The alley was dark, frightfully so. I tried humming to myself to keep my fear away. My sister Amy and I were walking through this shortcut. We had just finished our tuitions and we were walking through the shortcut as we were late for supper. A solitary lamp stood in the middle of the dirty, impure alley, its light flickering every second. Amy gripped my hand.
“Amy, what tuition homework do we have?” I asked my sister trying to think of something else and put the fear at the back of my mind. Before she could answer, I heard her cry out, “Ouch!” Amy collapsed on the ground. I turned around and to my horror I saw a masked man with a baseball bat in his hand. He swung the bat. I felt a sharp pain in my head. My vision blurred, and then everything turned dark. I blacked out.
Opening my heavy eyelids, I tried to rub my eyes. However, I could not. Only after a little while did I realize my hands were tied to a wooden chair. I scanned the surroundings. Where was I? I thought I was in the dark alley. How did I get here? As I look to my left, Amy was there also tied up. There was only a cupboard behind us and nothing more. The room was quiet and empty.
“Ha…!”, a low but sinister laughter was heard , “Let’s see if the big boss dares to fire us again!” Creak…The door opened. The big build men with tattoos all over their arms stomped into the room. “Want to live? We will only release when we get the ten thousand dollars.” One of the men exclaimed. Storm blew throughout the night. However, Amy and I were not asleep. We were rubbing the roped which tied our hands against the edges of the rusted metal cupboard behinds us. Snore… The men were soundly asleep. Dawn was breaking and we had to move fast. A wide smile spread across my face as the rope broke. Immediately, I untied my legs then went over help Amy.
“Hey you!” both of the men shouted. They were actually pretending to sleep. They chase us out of the hut and to the field. “Ouch!” Amy cries out. She kicked onto the stone and fell. She got up to her feet again and started running. Suddenly police sirens were heard. The police had been alerted by an elderly man bird-watching in the field. “Do not move!” the police caught the kidnappers and escorted them into the police car.
That afternoon, both of us returned home, weary and with aches all over. We could see our mother pale with red eyes. We hugged her. Soon, we knew that the kidnappers once worked for our father, but because they were too lazy, our father fired them. They then decided to kidnap us for revenge. We knew this experience was terrible and it would be etched in our minds forever.