For those of you who cant read the chinese scanlations here is a simple summary of chapter 56.
Warning: heavy spoilers (duh)
Eren wakes up from a short flashback
Sanes gets put into jail with the other guy. He angrily shouts at him for betraying him, but turns out it was Hanji's plan (he was forced to pretend that he didn’t care about sannes)
Hanji calls them rubbish and adds they deserved it.
Levi, 104th squad and Reebs have a meeting.
They reveal Historia is the real heir and Levi forces Historia to agree to take the throne.
Eren and Historia pretends to get captured by Reebs as part of Erwin’s plan and gets offered to the military police in order to lure out the leader behind (Historia’s father)
The guy who killed Historia’s mother comes to take away Eren and Historia.
They somehow figure out their plan and kills Reebs.
Before the guy (who killed historia’s mother) kills Reebs, he asks if he has heard of Levi Ackerman. Reebs pretends to know nothing much about him. The guy says they trained/taught Levi and is proud of him.
The guy’s comrades calls him Leader/Mr. Ackerman. So somehow he’s related to Levi as well.
Eren and Historia gets taken away. -end-