Tris- 17 year old thats is 100% divergent and wanted by jeanine
Four (Tobias)- 19 year old that is also divergent and really strong
Evelyn- Tobias mom and leader of factionless
Caleb- Tris brother a helper of Jeanine as well
Jeanine- The president and eager to open a message from a founder of their city
Four and Tris go to four factions: factions erudite, dauntless, candor, amity, and factionless to meet Four's mother and they are all different. This is in the future after war.
There is many attacks in all factions to figure out who the divergent are and who is the most powerful and that ends up being Tris. The president is trying to find Tris to open the box with a message and the people that are working with the president are going to extreme measures for Tris to finally turn herself in.