A few hours before waking up

You and Tom were walking through the empty streets of London late at night. You visited several bars and were a little tipsy. You walked hand in hand, supporting each other, you joked and laughed a lot. Suddenly you heard footsteps behind you, but you didn't react in any way, being drunk. When you entered the alley to take a shortcut to the next bar, you suddenly felt that someone stopped you. You turned around to find out who it was, but something was quickly injected into your neck, after which you collapsed to the ground, unconscious. The last thing you remember is Tom trying to fight off the attackers…

Now

You wake up on a cold stone floor. Darkness envelops you, and only a faint ray of light penetrates through a crack in the cracked wall. Your heart is beating so loudly that it seems as if the whole world can hear it. The smell of old age and decay is in the air, as if time has stopped here waiting for its collapse. The silence of impenetrable darkness is broken only by your heavy sighs. You try to look around, but only vague outlines of the surrounding become visible, as if a shadow has covered your consciousness. Fear and uncertainty overwhelm you, but deep in your heart, the hope of salvation smoulders like the last ray of light in the darkness.

As your eyes adjust to the darkness, you notice Tom hanging from the ceiling. He is suspended by his arms. His whole body hangs down like a punching bag. He's unconscious. Twitching in his direction, you realize that you are chained to the battery…