Chapter 1

"Guess what I'm doing this weekend?" Prentiss asked as the team sat around in the bullpen.

"Not another 'Sin to Win,' weekend," Morgan groaned. Prentiss just smiled.

"Oh no," he put his hands in his face.

"You still gonna tell me what they're about, Em?" Reid asked.

"Nope," Prentiss smirked, "and you'll never find out."

"I bet Garcia can pull 'em up," Reid taunted.

"Okay, guys, that's enough!" Prentiss exclaimed, "JJ what are you doing?"

"Will and I are gonna take Henry to the zoo," JJ answered.

"He'll like the animals," Rossi said, "so will Will." JJ lightly punched him in the shoulder. Just then, Hotch came striding into the office.

"Oh, and what's our favorite Unit Chief doing for the weekend?" Rossi asked.

"Nothing," the stoic boss quipped, "look. I don't mean to ruin your weekend, but we got a case."

"Can't it wait?" JJ groaned.

"Fraid not," Garcia said, "this one looks pretty gruesome."

"And by gruesome, she means let's get started right now," Hotch commanded.

"Four victims—two women and two men were found dumped on the side of the road. They were hardly recgognizable because-" Garcia cringed, "he disfigured their faces."

"Sulfuric acid," Reid noted, "very effective way of getting rid of the evidence."

"Oh, there's more," Garcia quipped, "all of the victims' bodies were TOTALLY burned. Not just their faces. I mean, well, you have pictures!" She quickly sat down.

"Do we know how they got there?" Morgan asked.

"It appears he keeps his victims and holds them for a couple of days," Hotch explained, "when they become of no use to him, he sprays them with sulfuric acid."

"That's brutal," Prentiss added, "sulfuric acid? That takes a lot of time! You have to get the acid somewhere."

"I'm having Garcia track all purchases of sulfuric acid," Hotch said, "also, look into occupations that would give the unsub access to the chemicals—auto mechanics, chemists, we need to cover all our grounds. This man is organized and brutal and he will not stop. Wheels up in thirty."