http://www.thefandom.net/movies/watch-trailer-insurgent-sequel-divergent/

If you have seen the movie Insurgent, you will get this. This box is a special box kept by the parents of Beatrice Prior: Andrew and Natalie Prior now in the hands of Jeanine Matthews. The box is special, because it carries a message from the outside of the gates. The only trick is: that it can only be opened by a 100% Divergent of all the factions. In order to get the right Divergent it will have to be hooked up to a computer and a Divergent test subject will be tested to see if he or she is 100% to give the data to the box. Once the data is in the box it will open to reveal the message. Now that might not seem bad, but in order to get 100% true data, there will be pain. The test begins with the Divergent being hooked up to the computer with wires that stab into the body and cause reactions to he or she. For example if the subject were to be punched in the test, these reactors will cause pain in that part of the body. Yes, if damaged enough the subject can die. The Divergent’s test will be based off to see if they are like all five factions. The first test: Dauntless where they have to chase a flying burning house to catch a someone who means a lot to the test subject. If passed onto Candor where your finally reunited with that person and they will ask you if there is something you want to say. If you say the truth like: you don’t want to be Divergent or you just want to die. Basically a truth that means something and is not something like: I hate jelly or I think she is ugly. After that onto Erudite where you are saved by your beloved and in the midst of it your worst enemy will be at gunpoint and that is the Abnegation test. If you let the person live, you pass Abnegation. After that your beloved takes you away from the testing chamber and if your’re smart enough to realize the truth you will pass. Now it might seem dumb, but if you were being a test subject and could possibly die, I bet you would probably want to leave. Last is Amity, where you fight your inner, negative thoughts. The twist: the thoughts come in a physical form, yourself. That version of yourself will tell you insults like: your’re just another filthy Divergent and such. Also they will fight you and you can only run away and throw them if they get close to you, to pass the test. If you do survive and pass all the test the message will be opened and can be played any time. That is how you open the special box.