So basically
Shin told Wolfgang the truth about the Children's Chamber used by the king
Wolfgang wasn't having it.
Wolfgang was into Shin after a while of getting to know him and respected him deeply, and became even more disgusted at the King. So he marked Shin to show the King, it wasn't remotely a part of the plan but he helped dearly to show the King's true nature to the people.
You might be right and I still think it was Shin's plan.Because he said "I am yours" to wolfgang then only wolfgang marked him and we see in the next chapter King punished shin and threw him out of the palace.That's how Shin escaped himself from king and then plan goes on~~
SPOILER
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Can anyone explain what happened in ch 24? Was that all also part of the plan ?It's not like they confessed or anything?