Summary of Insurgent

So far in the book Tris turned herself in the Erudite headquarters before Jeanine can kill any other of Dauntless.  While being in the headquarters Tris laters find out that Tobias also turn himself only to try and get more information on Jeanine's plan on the next simulation attack.  While the Erudite were experimenting on Tris, Jeanine injects Tobias with another type of truth serum, so he can tell her where the faction less house is.  The house that contains the other Divergents.  He spills out where they are that's when Tris refuses to do any more experiments attacking Jeanine.  About a day later Tris's execution day comes only about weeks early.  About to be injected with death serum she is only paralyzed and Jeanine along with other Erudite's are tricked.  Peter saves both Tris and Tobias and they head back home to Abnegation quarters, the two talk about the attack and what to do.