The teacher paused mid-sentence when all thirty children smiled at once. Mr. Vale stopped writing on the board. The room smelled faintly of glue, crayons, and something older underneath—something damp. The children stared at him with identical expressions. He checked the lesson plan in his hand. Welcome students. Attendance. Multiplication review. Do not mention the previous teacher. At the bottom, someone had scribbled in hurried pen: If they smile together, leave immediately. His throat tightened. “Okay,” he said lightly, stepping away from the board. “Very funny.” No one moved. No one blinked. Then one child raised her hand. “Where is Mrs. Green?” The others kept smiling. Mr. Vale forced himself to answer calmly. “Mrs. Green is... unavailable.” A boy in the back whispered, “She tried to leave.” The lights dimmed briefly. Another child spoke. “She heard us after the bell.” Mr. Vale glanced at the clock. 2:59 PM. One minute until dismissal. Or whatever happened at dismissal. He backed toward the classroom door. It wouldn’t open. The children stood together. Still smiling. Still silent. Then, from the hallway, came the sound of footsteps. Dragging slowly across the floor. Mr. Vale looked through the narrow window in the door. A woman stood outside. Head tilted. Face pale. Mrs. Green. One small handprint pressed against the glass from the other side. The bell rang. Every child turned toward the hallway at once. And for the first time all day, the silence finally made sense.