C43 Eerie blood-red word

After a moment, I immediately left the room and returned to the outer room.

Looking at the footprints on the ground, I am a little confused. Although our footprints were left on the ground last night, our range was in the middle of the outer room and we didn't go into the inner room.

Furthermore, our footprints were already dried, but the footprints on the floor were not completely dried yet