Boo was playing with her dolls on her bed. She looked up at he closet door with a big smile when she heard a knock coming from it. She opened the door to the monster world, but it wasn't the one she was used to. She walked out of her room, searching for Mike and Sulley.

"Where am I?" Boo asked.

The closet door slammed shut, then it lost power. Boo turned to see she couldn't get home.

"Guys?" Boo called out. "That's...that's really funny...but I'm a bit scared now."

"You should be."

The voice was very familiar. Boo searched the room, but she couldn't figure out where it was coming from. Suddenly, Randall appeared out of nowhere, and Boo gave a startled scream. Her voice echoed.

"I'm not afraid of you!" Boo pointed angrily at Randall. "You're just a big stupid meanie!"

"Yeah, that sounds about right."

Boo wished she had Sulley to protect her...or at least a baseball bat. "Where am I and where's Mike and Sulley?"

"You are currently standing in the old scaring factory." Randall said. "As for Wazowski and Sullivan...well, I've given them what they deserve."

"What happened to them! Tell me!" Boo exclaimed.

"They're inside a door, but they can't get out. Kinda like the situation you're in right now. If you do exactly what I tell you, they'll be released and you'll be put back into your safe little room. Is that a deal?"

Boo thought hard on that. The odds of Randall lying were pretty high. After all, big stupid meanies are prone to lying, but then again, big stupid meanies are also mean. What if he was telling the truth? So many thoughts flooded into her mind, until she finally came to a conclusion.

"Fine." Boo finally said, "But I won't like it."

Unfortunately for Boo, Randall was indeed lying. Mike and Sulley were safely across town in a very tall apartment building. Mike finally found the key to the room, and the two burst inside.

The apartment was completely empty, and there was no sign of Boo's door. The apartment was very clean with pictures of her family, and many pictures of her and Mike.

"She's not here." Sulley said, not knowing what else to say.

"There has to be a clue around here." Mike said, searching the apartment.

Sulley felt uncomfortable searching through Celia's apartment, but he didn't voice his discomfort. He just watched as Mike scavenged for clues.

"Mike...people don't just leave clues lying around." Sulley said.

"They do all the time on those law shows." Mike responded, now searching through the kitchen.

"What kind of clues are you looking for?" Sulley asked.

"Anything. A print. A diary entry." Mike said, still looking through the kitchen. Sulley decided not to tell Mike people don't usually keep diaries in the kitchen. "We need to find the smallest clues. The detective always looks through the apartment very thoroughly, because it's not like the perp will just walk right in."

"What are you doing in my apartment?" Celia stood in the doorway, looking a bit confused, but mostly concerned.

"We were about to ask you the same thing." Mike said.

"I live here." Celia said, dryly.

"Okay, Celia, I'm gonna cut to the chase." Mike said. "Did you take Boo's door?"

"White, with pink flowers?" Celia asks. Mike nodded. "Then...yes."

Celia hated the hurt expression on Mike's face. "Why did you do it?"

"It was Randall, okay? He's back, and he was blackmailing me. What else was I supposed to do?" Celia asked, throwing her arms in the air.

"Maybe tell us?" Mike suggested.

"He was telling me he was going to hurt you." Celia said. "And I couldn't let that happen."

"So you're letting him hurt a little girl?" Mike exclaimed.

"He was illegally banished anyway. Wouldn't you have gotten into trouble?" Celia asked.

"I would rather get into trouble than Boo!" Mike retorted. He put his hand to his brow. "Look, Celia, you're not getting this."

"You're right. I'm not." It was Celia's turn to be upset. "You never tell me anything! Why didn't you tell me about Boo in the first place?"

"I did, but you didn't believe me!"

"Why didn't you tell me Randall was back?"

"Because he was blackmailing me!"

Sulley had no idea what to do, being in the middle of the argument.

"You know what? I'm wasting my time." Mike said, turning to Sulley. "Let's go."

"The only reason why I kept it a secret was because I love you." Celia said. Now it was Celia's turn to have a hurt expression.

Mike stood in the doorway. He looked up at Sulley, then back at Celia. "I have to go."

Celia stood in the apartment, staring at the door where Mike and Sulley left. Was this it? Was it over? She was a bit surprised to see Mike standing back in her doorway.

"Look, Celia, I can't stay mad at you." Mike said, a small smile playing on his lips. "Will you help us look for her?"

Celia didn't say anything. She ran to the door, locked it, kissed Mike, then ran down the hall. She turned to see Mike standing there. "What are you waiting for? Let's go!"