"From the work we've gathered at the scene, it appears that Patty knew her attacker, and as such didn't try and resist, as she thought that the person, be they male or female was going for a friendly embrace. Instead, they ended up choking her until she died." Joe says, looking around at the faces looking at him in the cortex.

"She was choked?" Barry asks surprised. "I thought there were no actual prints on her?" Caitlin takes his hand then.

"At first, we thought there was not, but then later analysis conducted by Julian showed that there was. As such the hunt is on, video footage emerged showing Alchemy talking to Bivolo as well on the day that Patty died." Joe says, assessing the reactions around him.

Iris is the one who speaks first. "So, do you think Bivolo is the one who killed her?"

Eddie steps in then. "Bivolo was killed before Patty was killed. That much we know. It seems that whatever Alchemy and Bivolo wanted to discuss, they did so, and then Bivolo came here, for Caitlin."

Barry's grip on her hand tightens, and Caitlin sighs. "So, you do not think they targeted her. But do we know exactly who it was that did the deed yet?"

Joe shakes his head. "No, and that is why I am here." He pauses at the looks of surprise on their faces. "I know this is a lot to ask, especially considering what happened the last time you faced him, but do you think this might have something to do with Savitar, and if so, do you think you might be able to face him again Barr?"

Barry ponders the question. "I'm not sure. Unless Savitar knew that I was friends with Patty, I'm not really sure why he'd go after her. She didn't know I was the Flash." At least he hoped she didn't, otherwise that would've been complicated.

Wally speaks then. "Isn't it possible that he targeted her because she was friends with you as Barry Allen? From what you've said, it seemed as though Savitar knows exactly who you are."

Barry thinks on this for a moment, and looks at Caitlin to see what she thinks. He is surprised when she looks absolutely terrified. "What is it Cait?" his heart racing.

"I remember when Alchemy confronted me out in the car park. He said something about knowing who you were. I did not think he was being sincere. I thought he was merely trying to get information out of me. So, I said nothing. But then, I don't know." Caitlin trails off, her memory of that night is a blur after the confrontation.

Barry kisses his fiancé's hand and says. "It's fine Cait, what happened wasn't anyone's fault." He looks at Cisco and asks. "Have you been able to find out anything more about Alchemy or Savitar?"

Cisco nods. "I have." He quickly moves to the computers and begins typing up one thing after another, resulting in several clips coming up and playing. "These clips are all the historical record of Savitar. He's been noted throughout time and history under different names. But always with the same power, and want."

"And what is that want?" Barry asks, not sure if he will like the answer.

"To become the fastest thing alive." Cisco says shortly. "He took speed from the gods, or what we now think of as gods, he took speed from cheetahs, from all sorts of animals, and he shaped into something he could truly channel. That's why he has his armour on now."

"Is that why he's coming after Barry?" Caitlin asks, a slight tremor in her voice.

"Yes." Cisco says simply. "He wants your speed, but he is stuck. From what I've been able to figure out, he's stuck within the Speed Force, the way Vega managed to trap him. But he can come back, when someone uses the Brahmastra, or the Philosopher's Stone to summon him."

Suddenly it comes back to her. "Alchemy's stone!"

Cisco nods. "Exactly. How he got it, I do not know. But we shall need to find a way to get him in front of you Barry. And to prevent Savitar ever returning, you will need to destroy the stone."

"How am I supposed to destroy the stone?" Barry asks his mind whirring. "The last time I tried to get near to him, he summoned Savitar."

Cisco hesitates. "I'm not sure. Truth be told, I think we might need to combine our powers." He looks at Barry, Wally and Caitlin. "All of us."

Barry goes to protest; he doesn't want Caitlin to do something that she might regret. But before he can Caitlin shakes her head at him. "Are you sure?" he whispers.

Caitlin nods. "I am, we need to do this, and soon." She looks at Cisco and then at the computer. "And it looks like we've got the opportunity to do so now."