Summary: When a body and a kid turn up in the streets of Star City, why do they just so happen to be connected to a certain Scarlet Speedster?, and why are they also attached to a string of murders down in Central City? Can Team Arrow and Team Flash come together and stop these crazed murderers or will the pressure of secrets keep them all divided?

Oliver sighed as he fired another arrow at the man, who just so happened to be shooting bullets at him as he hid behind the stone pillar. He was in the middle of fighting Vigilante when they were suddenly ambushed by these armed men. Vigilante had bolted the moment the men arrived, leaving Oliver to take them on all by himself. Spartan was busy on another floor of the building and had no idea as to what was happening as Oliver's comms had begun to fluctuate the moment he was face-to-face with Vigilante.

Cursing softly, he stepped away from the pillar once all the guns had stopped. When he stepped out though, he wasn't expecting to see all of the men laying on the floor, and he definitely did not expect to see a lightning bolt to be burned into the ground just meters away from the bodies. He was surprised at how Barry didn't bother to stay though, he would usually be bouncing on his heels with excitement whenever he would see Oliver.

"Oliver, you back with us?" He heard Felicity's question in his comms. At least that was working well again.

"Yeah, I'm back. And remind me to get in touch with Barry" He grumbled in response, running down to where Diggle was waiting next to their motorcycles, he seemed to be just as confused as Oliver was, but anything involving a certain Scarlet Speedster was always confusing him.

"Surprised Barry didn't stick around to say hi" Diggle remarked as they hopped onto their motorcycles and drove back off to the Foundry, ready to fill Felicity in on the whole situation.

Central City

Same time

Barry groaned as he finished the last slice of his 5th large pizza, he was officially full. Iris and Joe had never given him a hard time about the amounts he had to eat and he was thankful, he didn't want to hear nasty comments about his eating habits like he used to at C.C.P.D whilst he had Julian in the lab with him.

Team Flash had all been invited over to Joe's for a movie night after a horrible day. They had all suffered some awful luck and Cisco even believed for Hazard to have come back from the dead to haunt them all for throwing her into Iron Heights.

Barry's phone ringing brought them all out of their conversations. He was shocked to see who it was ringing though, considering the last time he had heard anything Oliver Queen related was when he and Iris were in couples' therapy and it was announced on the front page that he was indeed, the Green Arrow.

"Hey, Ollie, what's up?" Barry asked, trying not to sound worried over the phone, when realistically, his mind was buzzing at around 1000 mph with thoughts as to why he would be calling this late.

"What do you mean, 'what's up'? You just saved min and Dig's asses and I want to thank you for it" Barry looked perplexed at the statement. Firstly, Oliver was accusing him of something he didn't even though, and secondly, Oliver Queen wanted to thank him for it.

"Um, what are you talking about?" He asked, suddenly exiting the lounge and entering the kitchen for a little bit of privacy.

"You really don't know why I'm thanking you?" Oliver pressed, suddenly becoming unsure on what to think about the mysterious speedster.

"No, I haven't gotten a clue as to what's going on" Barry replied, a feeling of dread building up in his system.

They needed to figure out who that was, and fast.

Star City

The next day

Quentin Lance sighed as he stared at the body in the case file. Someone had decided to give her a bullet to the brain, they have no idea who did it and if they had a motive to kill her as she was an Ex-Detective.

Grumbling, he dialed the only person he could think of to know anything about this, considering he was there last night.

"Oliver, I'm gonna need you to take a look at something"

S.C.P.D [Star City]

40 minutes later

Oliver casually strode into the building with a random bounce in his step. Since when was Oliver Queen happy? And suddenly seeing the world as the best place ever?

He located Quentin Lance rather quickly, suddenly composing himself as he approached his ex-girlfriend's father.

"What did you need me to look at, Sir?" He asked, a general form of maturity suddenly took over and Quentin was quite shocked at how fast the man could change emotions. Quentin pulled out the case file after making sure no-one was looking at them and handed it to the mayor. He watched Oliver's face contort through multiple emotions, all of them unreadable to the S.C.P.D Captain.

"How did this happen?" Oliver asked after a moment of shock. He didn't enjoy looking at the graphic photos of the victim's body, and it made him want to throw up but he held his composure well, not showing that he was affected by it.

"Our CSI is too dumb to get an idea on the cause of death, he's thinking bloodloss, not what caused the massive cuts on the body" Quentin informed him, seeing his skin slowly begin ti change from a slight pale to a slight green tinge.

"Let's get Barry Allen up here then, he'd know the cause and how many people to look for" Oliver said, closing his eyes to keep his nausea at bay whilst he addressed Quentin. Quentin nodded and shook Oliver's hand, he trusted Oliver's opinion on this. If they needed Barry Allen then they'd get him.

C.C.P.D

Same time

Barry sighed as he sat at his computer in his lab. The results on the screen were more than damning, they had a dirty cop and he had trusted said man with a lot of information regarding the victim. He turned back around to the blood analysis machine and decided to clean it, he hadn't had a case in awhile and he was slowly getting bored.

"Allen, Captain Singh wants to see you" Officer Larkin informed him, a gentle smile on his face. Officer Larkin was a nice man, he had a wife and two children who he adored very much, and he was an amazing officer in the force. He also looked out for Barry whenever Joe was unable to, it was like he had fatherly instincts to look out for him.

Barry softly cursed under his breath as he stood up, he never enjoyed being called into Singh's office. The main reason for that was because he was usually being reprimanded for being late. Maybe that's why Officer Larkin had to tell him, to help soften the blow a little bit.

"Have you been watching football recently?" Officer Larkin questioned Barry as they left the lab, it was clear he was trying to distract him so he wouldn't get anxious about why Singh had called him and he would always be grateful for an Officer like him.

As they descended the steps, Barry caught Joe looking at him every now and again, a concerned look on his face as he saw Barry and Larkin head in the direction of Singh's office. He couldn't keep his eyes on them for ages though, considering he was in the middle of getting a statement from a very shaken witness.

Larkin left him with his thoughts once they were outside Singh's office. Barry sighed softly as he knocked on the door and entered when Singh yelled for him to do so.

"You've been requested to go to Star City, upon both Captain Lance and Mayor Queen's request" He told Barry, looking up from his computer to look at his CSI.

"Okay sir" Barry breathed out, Singh knew that his CSI was nervous around him, but it didn't affect him whilst he did his job, and as long as he did that then he didn't have an issue with it.