The Pound Puppies found themselves standing in a huge, multistory labyrinth, with doors and hallways everywhere. They stood in awe as they stared at the numerous workers, scientists, and others hurrying along the grounds of the lab. They couldn't believe their eyes. "Strudel, do you, by any chance, know what to do?" Lucky asked, confused. "Well, I believe Dr. Matazewski is currently working her job as a researcher. She should be nearby." They then heard an announcement over a loudspeaker. "Will Dr. Matazewski please report to SCP-173's testing chamber along with D-9341?" "Ah! See? Convenient!" Strudel said. "But where are the testing chambers, and what on earth is an SCP-173?" Asked Cookie. "Well, I guess we'll find out soon." Lucky said. "Look, up there!" Said Squirt, pointing up at the roof. There was an arrow sign that read "Testing Chambers." "Alright, I'm guessing that's where it is. Come on." Lucky said. Everyone followed.
Nightfall arrived as they continued to search for SCP-173. The halls were only lit with the few incandescent bulbs that a remained functional. Ominous red-covered stains sometimes covered the walls they encountered. They soon arrived in a big white room with a pair of big rusty iron doors. "All Class-D personnel please step into the testing chamber." Commanded someone over a loudspeaker. They looked to their left to see the doors slowly and loudly open. They also noticed an overhanging sign with "SCP-173" written on it. "I believe we've found it." Lucky said to everyone. "You too, D-9341!" The person on the loudspeaker shouted. Somebody in an orange jumpsuit disappointedly walked into the large empty room that the door was leading to. Ellie then spotted a young woman in a white lab coat just outside the door, peeking in, and jotting down notes on a wooden clipboard. It was Dr. Matazewski.
"There she is!" Ellie exclaimed and started running to her. "Not yet, kid. We need a proper distraction." Lucky said to her. Strudel smiled. "Strudel, do you have something in mind?" Asked Lucky. "Of course. When they try to close the door, I will hack into the system and stop it. Dr. Matazewski will try to fix it. When she goes in the chamber, Ellie will be there when she comes out." Strudel explained. "I don't know about that. It seems really risky. And we don't even know what's in there." Lucky warned. "Oh, please. I am the genius around here. And besides, humans wouldn't just send people into a chamber if there was something deadly in there." Strudel said boastfully. "Alright, but make sure you know what you're doing." Lucky said. Strudel brushed that off, confident that she can make it work, anyway.
"Alright, I am now going to shut the door. Please approach SCP-173 for testing." The person over the loudspeaker told them all. Strudel executed her plan. "Uh, the door is not responding to any of our attempts to close it, so keep an eye on SCP-173 at all times." He said. Strudel chuckled to herself. "Uh, oh. There must be something wrong with the door mechanism. I'll try and fix it." Dr. Matazewski said. She walked into the chamber. "That's your queue." Lucky said to Ellie. Squirt placed a tag on her collar. "Once a Pound Puppy, always a Pound Puppy." He said proudly and quietly. Ellie ran into the chamber, but Strudel's plan fell apart quickly.
Ellie went into the chamber, only to discover three dead bodies, covered in blood. Dr. Matazewski ran out as quickly as she could, frightened and screaming. Ellie looked down to discover she was standing in a pool of a chunky brown and red substance. She looked back up to see a tall concrete figure no more than a couple inches from her. Startled, she quickly ran the other way. "The site is experiencing multiple Keter and Euclid level containment breaches!" The person shouted. Strudel came back to the group. "Strudel, what did you do?" Asked Cookie angrily. "It's not my fault, I swear!" Strudel said panicking. Red lights started flashing and alarms sounded as the whole place dimmed significantly. "Okay, I may have had a little to do with all this." She admitted. "Lockdown procedure initiated!" The person announced. Screams could be heard as well as what sounded like bones snapping. "Everybody, run!" Yelled Lucky. They all ran in separate directions and all the lights went completely out.