inky fingers

This picture is in the blog the first one which is not drawn by me – my new friends drew it for me,
telling about their day at the beach:

(they signed the picture, so you really can see there are other artists now)

Does the story need some explanation? I do not have very much.
In March, the InterRail -tickets were sold in reduced price, -15 %, in the whole Europa, I suppose. The train conductor noticed the “wrong” price.
Where he did get the other wrong information about how the Finnish railroad tickets should look like, I do not know.
The police, of course, did believe him, not me. How our railroad company, VR, got them convinced about my ticket, I also do not know.
But the ticket was completely normal, valid InterRail ticket sold by VR.
The end is well, all is well?