Since the Paw Patrol started helping people from Adventure Bay, Marshall the dalmatian was working as a fire fighter and he always helped his friends. But by no reason, he sometimes feeled sad and depressed, and one day, his friend Everest was helping him order his books in his shielf

Everest: Hey Marshall! Where do I put this book at?

Marshall: In the middle Everest

Everest: Okay, I'll put it

And when she was going to put it, some books fell down

Everest: Oh! Sorry Marshall

Marshall: Don't worry, we can order them again

Everest: Okay

They started putting the books on the shielf, untill Everest find one of the books on the ground with a picture on it

Everest: Um... Marshall?

Marshall: Yes?

Everest: What is this book about?

Marshall: Oh! You found my diary! I've been looking for it by a long time!

Everest: It's your diary?

Marshall: Yes Everest, it is

Everest: Okay... and who is this person on this picture?

Marshall: What picture?

Everest showed a picture of a black hedgehog with red stipes and white fur on his chest

And Marshall dropped a tear from his cheek, cause it make him remember something from a long time

Everest: Marshall, are you okay?

Marshall: The... picture... I can't believe it was still here

Everest: What are you talking about?

Marshall: Shadow...

Everest: Marshall, you need to tell me about what are you saying, I don't understand you

Marshall: Everest... can I tell you a secret?

Everest: Sure, what secret?

Marshall: I will read you my diary... about when I had a friend called Shadow

Everest: Shadow? You mean... the hedgehog in the picture?

Marshall: Yes, that's him...

Everest: And he was a friend of yours?

Marshall: Yes... he was...

Everest: And your diary is written about you and him?

Marshall: Yes, each day I will read you some adventures that we had, but only one of them each day, okay?

Everest: Okay, and how many adventures did you write?

Marshall: Um... 15...

Everest: Okay, I listen to you Marshall

Marshall: Well then... this is the part when I met him for the first time...