"I'm going out on a date tonight, Sherlock" said John.
"Yeah" replied Sherlock.
"Should I um… pick up some stuff for you?"
"Sure."
"What do you want?"
"Yes"
"Oh what the heck, you aren't even listening!" said John before he left.
Sherlock then proceed scrolling down his blog and found one interesting case, about a vanishing blue box. He phoned the person that posted that case. He said he could come to the apartment tomorrow. After that, Sherlock proceed scrolling through the blog.
Beep, the doorbell rang.
"It's a client, Sherlock" John said.
"Hey, I'm looking for Sherlock Holmes" said the woman.
"I know, come in" John invited her in.
"Hello" said the woman, "My name is Helen, and I'm here about the vanishing blue box"
"Yes, you said you did some research about the blue box?" asked Holmes.
"Yes, I've found out that it didn't just happen once, there had been sighting of the blue box throughout the history, but the blue box appeared more frequently in this time."
"Also almost every time the blue box appeared, it is always followed by some disaster or some big events."
"Examples?" asked Sherlock.
"Like that time the giant spaceship that hovered over London, also that giant Christmas star, and also the Titanic spaceship that almost crashed into the palace" answered Helen. "And yesterday, I found it! Right on the street but nobody seems to think it's weird. I swear it's real, I even got a –"
"What is this madness?" interrupted John.
"Hey, let the lady finish," said Sherlock.
"Well, I even got a photo." Helen gave her phone to Sherlock.
There it was, on the screen of Helen's phone, sitting on the sidewalk, getting in everyone's way but nobody noticed, was a Police Public Call Box.