They too have seen them? It's too coincidental ...

I've already found two elements of the puzzle ...

I have only to follow them to see where they go.

If I want to join them ...

I have to find their headquarters ...

... To find out what it all means.

Where have they gone now? I don't see them.

Now that I think about it, this is not the old gymclass?

The last element of the enigma said it was an "old place" ... maybe they are hiding here?