Idea for an video story please help

[nena_sakura]

So
I have to write a short story for my video class

The topic is lost and found

Then I have to make the video and the video has to be 5. -6 minutes long

It has to be either found and lost or lost and found

With a beginning middle and end the places I choose should be real like
Lake
Or Forrest
Or
Hallway

I have a bunch of ideas

I am thinking of doing it a bit anime themed

Like
imaginary friend

Memory

Portrait

Darkness of shadows


I tried combining this ideas don't know how to start
Where to begin

Thank you

Please excuse. Me if there are spelling errors
I am typing from my phone sometimes it auto corrects into something different