They were jarred from their slumber, too early, the next morning, by the ringing of Steve's phone. Danny groaned and tried to hide his head under his pillow, while Steve rolled over and swung out his arm to snatch up his cellular device.

A few quick words were exchanged before Steve hung up. He lay there on the bed for an extra moment, giving Danny enough time to think maybe it wasn't a case. Then the SEAL sat up and swung his legs over the side, causing Danny to groan again.

"I'll meet you downstairs, Danno." Steve said, twisting around and placing a quick kiss on Danny's cheek before disappearing into the bathroom.

Twenty minutes later, Danny came downstairs to find Steve waiting for him with a cup of coffee in a travel mug.

Steve headed for the door. "What about the girls?"

"I left them a note." Steve said, gesturing for Danny to 'come on'.

About half an hour later, they were at the office, Kono, Chin and Lou already there.

"Hey guys, sleep in?" Kono called, grinning.

"Maybe a little." Steve replied, rolling his eyes. "What do we got?"

"We don't really know." Chin replied. "HPD received some calls about mysterious happenings around an abandoned building."

"And they called us in?" Danny asked, stifling a yawn.

"Well, one of the callers was identified as Sang Min." Chin said skeptically.

"Sang Min's in prison, unless I'm missing something." Steve said, raising an eyebrow.

"Exactly." Kono said. "Which is why we were called in. During the call, Sang Min said that one Peter Laleena had been going to this abandoned building an excessive amount in the past month, and that he was known for making 'booming first impressions'."

"What the hell is that supposed to mean?" Steve asked, brow furrowing in confusion.

"No idea, boss." Kono answered.

Sighing, Steve divided up tasks. "Chin and Lou, you guys go to the prison and talk to Sang Min. Kono, you stay here and see what you can find on this Peter Laleena. Danny and I are gonna go check out this abandoned building."

Steve pulled the car to a stop down the street from their abandoned building. It didn't particularly look abandoned, but at the same time, it didn't look lived in, or used. They were beside a residential area under construction, and not that far from other business buildings.

Looking at the building skeptically, Steve sighed again before pushing open his door and climbing out of the driver's seat. He walked around to the trunk, already knowing this was going to be a long day. It was barely ten in the morning, and he already had the beginnings of a killer headache. Closing his eyes for a moment, he pushed away his discomfort as best as he could and pulled out his vest, not willing to take the risk of being shot in the back once they were in the building.

He was just pulling it on, when Danny joined him at the back of the camaro. He pulled out his own vest, looking at Steve.

"You ok, babe?" Danny asked, brow furrowed in concern.

"Yeah. Fine." Steve mumbled.

Five minutes later they were ready to head out. Closing the trunk, Danny followed Steve as he walked towards the suspicious building. Reaching the door, Steve drew his gun, quickly followed by Danno. With practiced ease, they strolled into the building, swiveling to check all corners.

It didn't take long for the two of them to clear the four floors above ground. Heading back to the first floor, they found the door that led down to the two lower floors, and began their downward trek.

First basement level cleared, they continued onto the lowest floor, beginning to feel like they had been played.

Something was off about this level though. There was a table sitting in the middle of the floor, with an envelope sitting on it.

The whole floor cleared, Steve and Danny gathered around the table confusion turning to suspicion.

The envelope was simply addressed: 'Five-0 Leaders'. No names of even ranks, just those two and a half words.

Steve cautiously picked it up and pulled out the paper inside. Unfolding it, he read it twice, eyes widening.

"Move!" Steve shouted, pushing Danny towards the staircase they had come down. But it was too late.

With a resounding 'BOOM', the roof collapsed on top of them, bringing the five higher floors with it.