The mystery of the new skin is hidden, and the challenge is opened

【A mysterious challenge letter】

Hello, codename Butterfly, Hunter of Hidden Light.

You don't know me? Oh, intelligence, codes, puzzles, these are all ways of acting under the city. Without a meticulous mind and the determination to give up everything, it is impossible to protect others...

I challenge you: everything about me, everything about "me," is already hidden in the video of the Hidden Light Squad.

To discover, to think. In the midst of the complicated mysteries, find me and go to this night mystery trail!

When you solve the puzzle, we will meet behind the light...