Using a car in Boston downtown for half a mile was a major waste of time, so Gillian had walked from the station to Boloco. Now she hurried back to her office, brushing past people, phone to her ear to get any update in real time.

Her team caught up with her at the first corner, and Hank moved to the passenger seat to give her room behind the wheel of her own car. The SCU black van speeded up past them and she stepped on the gas, following it as Hank reported, "It's Boston Best High. They're having a cheerleading competition this weekend. The Bomb Squad is standing by, and we already alerted the school authorities. They're making it look like an emergency drill, so the bomber has no chance to remove the device."

"Another high school for rich babies. We're lucky it's small." Gillian said as she steered in the traffic. "We need the location secured as soon as the kids are out, a fire truck and an ambulance. How did we find out?"

Hank opened a file on his phone and showed it to her. She managed a quick glance: it was the picture of an open backpack with a school badge, and inside of it, what looked like an explosive device. The photograph was hashtagged #blowme.

"Shit," she growled under her breath.

Both vehicles skidded into the school's parking lot, where boys and girls were only starting to leave the main building. Fred jumped from the van and ran to the gym. Ron and Aldana lingered by the vehicle, gearing up. Hank stayed at the building's gates with the teachers, supervising the students' exit, while Gillian made her way through them into the hallway, where she found the principal.

The flurry of their arrival in Kevlars, plus Ron and Aldana in their special suits with helmets, told the students this wasn't just one of the principal's odd ideas. But if anything, it made them press on.

A dozen cruisers arrived and uniforms spread out, directing away the students who didn't get on the buses.

The gym was a deserted mess of painted cardboard decorations, abruptly dropped and abandoned. Fred halted right past the door and opened the picture of the bomb on his phone. His eyes scanned the place. There were over a dozen backpacks like the one containing the device, scattered all around. But none of them was the one he was looking for. He studied what showed around it in the picture and scanned the gym once more.

There, the side of the small stage. Made perfect sense. He was striding across the gym when Ron and Aldana came in. They didn't need to ask anything, they just followed him. And there it was. The bomber had taken a moment to try to hide it under a curtain.

Ron made Fred go back all the way to the door, then he crouched before the backpack and unzipped it carefully. "It's not exactly a bomb," he said, taking a look at what was inside. "It's an incendiary device."

He and Aldana glanced up at the curtains and then to the cardboard decorations spread around. Placed there, the device was meant to set the whole place on fire within minutes.

"Crap," grunted Ron then, taking a closer look at the device. "Maybe there are more of these packs."

Aldana crouched by his side and he pointed at the front of the device: it read #3. "And our scanners wouldn't detect them," she muttered. "So we have to canvass the whole place the old way."

Ron turned to Fred, still by the door, and said, "We should call the Squad and Jules."

"I'm calling them," Fred replied, already producing his phone. He paused, noticing Ron's face. "I better go out to make the call, right? At least until you find the trigger?"

"That a boy."

The last students were already leaving. Gillian was at the gates of the main building with the principal when they spotted Fred coming out of the gym on the phone. Gillian noticed he was unusually serious, so she excused herself and went to meet him.

"So Ron thinks there are more devices," she said when he explained what they'd found.

Fred was about to nod when he saw Cook's car entering the lot. Gillian followed his look and huffed. "Here we go," she grunted. "Fill Hank in, so he can handle the principal," she said, and crossed the parking lot.

Cook stepped out of his car, looking around. Gillian swallowed her surprise when she noticed he didn't look pissed, but wisely concerned. She got to his side and waited for him to make the first move.

"Heard over the scanner that your agent requested the Squad and Jules, with the Fire Department. So incendiary, not explosive?" he asked.

Okay, miracles did happen. "Yes, sir. We need to search the grounds."

"Of course. How did you get here?" Gillian hesitated and Cook scowled at her. "I see, you and your hackers," he grumbled. "Will you ever play by the rules? Never mind. How did you find out?"

"The Johnson case, sir. I can give you a full report whenever you have a while."

"You're saying this is related to the boy's murder?"

"To his killers' associates."

"I wanna hear all about it first thing tomorrow."

"Yessir."

Cook spotted a TV truck driving closer. Gillian forbade herself to smile. Now his diva soul would be glad, getting the share of camera he couldn't get in the morning. Cook shot a questioning glance at her.

"I told the principal we got a warning call, sir."

"Then we'll stick to that."

"Yessir."

"Go, I'll handle them."

Gillian managed to stay serious as she nodded.

She walked away, docile and proper enough to make Cook wonder if there was something wrong with her.

She was halfway to the main building when she recalled Brock's words from last night: revisit. That pushed her to remember what she'd read long ago, in one of the manuals Brock had written for the FBI: Mission-oriented offenders, if kept from achieving their goal, will try again as soon as they can. That makes them sloppy sometimes, and therefore easier to identify and apprehend.

She pressed on, waving at Hank and Fred to join her as she produced her phone and called Tanya on speaker.

"The bomber might be still around, lads," she said. "We need to cover the whole perimeter around the school. T, get feeds from security cameras on the street. Fred, take the roof. Hank and I will take a walk around."

"I'm gonna need help, Reg," replied Tanya. "We're monitoring the website as well."

Gillian checked the time. "Okay, I'll call Connor. So, since you're getting your padawan's assistance, I want you guys to identify all the students still lurking around and look for overlaps among the B.E.B. members."

"Not fair," grunted Tanya, disconnecting.

Many kids had stayed around, outside the perimeter established by the police, and parents started to show up. While Cook was more than happy to handle the reporters that kept arriving like flies, the principal and her staff answered the parents' questions at the access to the school grounds. Gillian and Hank took off their Kevlars and slipped past the barrier unnoticed as Gillian called her son.

Connor was in his room, playing, and he apologized to his online companions right away to quit his game. Working with Tanya was always way more fun than any game.

Soon he and Tanya were online together, retrieving real-time feeds from the cameras all around the school, while Gillian and Hank strolled among the people gathered past the police perimeter, using their phones to take pictures of the students still lingering around.

A fire truck arrived a few minutes later, and then the Bomb Squad truck. Ron met Captain Jules with the Fire Department and Perkins, the Bomb Squad Leader. They inspected the homemade device Fred had found and organized their people to canvass the campus.