The first strike sounded like a dinner plate dropped onto concrete. The second sounded like a gunshot.

By the third, half the neighborhood had come to its windows.

Doreen Pike, sixty-eight years old and wearing the green raincoat she used for gardening, stood in the front yard of 14 Wren Court with a pickaxe in both hands. A white lace curtain trembled behind the damaged living-room window. She could see her own furious reflection multiplied by cracks.

“Come out!” she shouted. “You don’t get to do this to us!”

She lifted the pickaxe again.

The front door opened.

A younger woman stepped onto the porch carrying a single sheet of paper. She was barefoot, with a pencil tucked behind one ear and a long strip of blue painter’s tape stuck to her sleeve. She looked at the shattered glass, then at the older woman, without raising her voice.

“Before you swing again,” she said, “read this.”

Doreen breathed hard. “I don’t want your excuses.”

“It’s not an excuse.”

The younger woman came down two steps. Her name was Mara Venn. She had moved into the house eleven days earlier, and until this morning Doreen had believed her to be a professional nuisance who had come to close the only safe place left for children on the street.

Doreen pointed the pickaxe toward the paper. “You sent people to take down the climbing ropes.”

“I did.”

“You painted over the crossing marks.”

“I did that too.”

“And now you want me to read?”

“Yes.”

Something in the answer stopped Doreen. Mara held the page by its corners, leaving room for Doreen to take it without letting go of the tool. It was a printed instruction sheet, with a crude drawing of three rectangles and a narrow black strip.

Doreen read the heading first: TEMPORARY PEDESTRIAN ROUTE — EFFECTIVE TODAY.

“That’s what I said,” she snapped. “You’re closing it.”

“Keep reading.”

Below the diagram was a list of times, a warning about the rear lane, and a line boxed in heavy ink. Doreen’s eyes moved across it once, then again.

DO NOT DIRECT CHILDREN THROUGH THE EAST GATE. THE GATE OPENS INTO THE SWEEP PATH OF THE MOBILE PRESS PLATFORM DURING ITS FIRST REVERSAL.

At the bottom, in smaller letters, was a second warning: FIRST REVERSAL MAY OCCUR WITHOUT AUDIBLE ALARM WHILE TEST MODE IS ACTIVE.

Doreen felt her fingers loosen.

“Mobile press?” she asked.

Mara nodded toward the empty street. “A forty-ton industrial machine is coming down that lane this afternoon.”

“No. The parade trucks use the west road.”

“It’s not a parade truck.”

Doreen looked again at the words first reversal. The annual Founders’ Day celebration was scheduled for Saturday. For thirty-six years she had led the children’s neighborhood procession along the path behind the houses. Yesterday someone had told her Mara planned to block that path for a private delivery. Doreen had spent the night imagining children turned away from the one tradition they still loved.