The Secret of a Queen

Personal Rating: Medium

We have this picture

Searching for it with reverse image search tools like yandex or google image search hinted at a specific encoding used by a queen in medieval times. There was a table to be found for how to decode it and even an online decoder. Using such a decoder or the table yielded this:

HTB ÜTHEBABINGTONPLOT Ü

So, which some common sense, the flag was HTB{THE<SNIP>PLOT}