I had a glitch with items falling through the floor of the tower. I dropped the hook and and left the screen and when I came back it was inside the floor. I tried to interact with it and it fell through. I had not opened the trap door yet so this almost meant restarting the game. I managed to fix it though by dropping the cloth on the floor then I used the hook on the cloth from below and the hook jumped back up through the floor where it was supposed to be.

Hope this helps if you run into this problem,