@Mazoku Alicia moves down the hallway, checking the rooms tactically to ensure that she doesn't get ambushed. In the last door down the hallway, she sees the source of the light. In a small, unimportant seeming office, a lantern stands on one of the table, illuminating the rest of the room in soft firelight. At the same moment, the nun feels the floor giving way beneath her feet. The wooden floorboards collapse, and she finds herself dragged into the darkness below.
As Rebecca hears a loud crash from the room Alicia entered, the nun manages to keep her footing, landing on her feet. It's too dark to see, but by a stroke of luck the lantern fell through the hole without shattering, and Alicia is able to light the area in front of her. She sees that she's in a small storage room, with maintenance supplies on shelves, and hanging on the wall. She hears a low moan, coming from behind her.
As Rebecca hears Alicia's fall, she too hears something from behind her, some sort of shambling.