One day at Foster's, I awoke to find something definitely very mysterious: there was a missing friend. At first I thought that this was just a coincidence and a friend had been adopted. Then I checked the calendar. Nobody was expected to come and it wasn't even Saturday. How strange. A friend missing when it wasn't even Adopt-a-Thought Saturday? That's when I knew I had to investigate. But maybe I should tell Madame Foster. When I looked around, I couldn't put my finger on why Madame Foster was nowhere to be found. At that, I looked in Mr. Herriman's office. He was in there, but he was very busy so I felt like I shouldn't bother him. Then I was lucky to find Frankie, who seemed to be trying to get to the bottom of this as well. I figured I would need her help, so I went up to her in my detective hat and with my detective gear.

"Hi, Bloo." She said, "Have you seen Eduardo lately?"

So it was my Mexican monster friend missing, I thought, sketching Eduardo in my notepad. My next question was obviously about Madame Foster.

"So, where is Madame Foster? I've looked all over the house and I can't find a trace of her." I said.

"All over, huh?" Frankie replied, "You obviously didn't check her secret lounging room."

"Secret lounging room? What do you mean?" I asked.

"It's secret for a reason. No wonder you couldn't find it. It's behind the wall of Foster's second floor." Frankie replied.

"Oh OK." I said, "So, where did you last see Eduardo?"

"Last night after dinner and then he vanished." She said.

"Hmm… quite strange." I said, "The thing is I couldn't find him this morning either."

"Maybe you should help me find him, Bloo." Frankie suggested, "You obviously hang out with him a lot, so you and I could ask around…"

"I'll start the interrogation process. Thank you, Frankie!" I said, walking off.

This was going to be both a piece of cake and a bit of a challenge.