Aj lee and the haunted house

Lost

Today we were still trying to find the person who was killing everyone, but still nothing. I all most gave up because every time we tried to find this mystery person, we just find another person dead. Well today was different. We found a clue. There was a key (that did not open the front door to the house) under a mat in the hall. We went to all of the rooms to see if it opened any of the doors but it didn't. We were so lost about why and how it did not open any doors. But a few days later, I fell and there was a little door on the floor. It was locked and the key opened it.