This second in the “Divergent” series suffers from sequel-itis. The exuberance of the premise buoyed the first episode, as we and the central character, Tris (Shailene Woodley) explored the post-apocalyptic world that divided all citizens into strictly segregated factions. But now that the foundation has been laid, the next steps are not nearly as exciting.

There is Candor (the honest), Abnegation (the selfless), Dauntless (the brave), Amity (the peaceful), and Erudite (the intelligent). The tasks of the society are assigned according to the qualities of each. Amity are the farmers. Dauntless are a combination of law enforcement and military. Candor are the judges. Erudite make the laws. Abnegation care for everyone, even the factionless, and due to their tradition, culture, and ethos of putting the good of others before themselves, they are the governing body.

But over time, the system has eroded. When Tris is evaluated for assignment to a faction, she is found to be “divergent,” with more than one of the qualities, and that is considered profoundly threatening to the system.

At the end of the last episode, she had joined the Dauntless and survived their brutal series of tests and escaped with Four (Theo James), following a battle that killed her mother, as Jeanine (Kate Winslet), an Erudite, is consolidating her power and turning the community into a dictatorship. As this chapter begins, Tris and Four are hiding out in Amity with Tris’ Erudite brother, Caleb (Ansel Elgort) and a member of Dauntless named Peter (Miles Teller).

Tris chops off her hair so that she spends the rest of the film looking like a cross between Peter Pan and Tinkerbell. Her Dauntless side is impatient in the tranquil community of Amity, where people murmur, “Go with happiness,” as they hand out food in the cafeteria line. She is determined to go back into the city and kill Jeanine.

Meanwhile, Jeanine has found a box that was hidden by Tris’ mother (Ashley Judd), and can only be opened by someone who is fully Divergent, possessing in equal amounts the qualities of all five factions. She is certain the box is the key to controlling everyone, and she must get Tris — alive — to get it open.

Four and Tris end up in Candor, where they are given a powerful truth serum. “May the truth set you free,” is not just rhetoric as the serum is administered. It will determine whether Four and Tris are turned over to Jeanine. They are proven to have been telling the truth but it is a painful experience and they end up captured anyway. Tris is forced to endure a series of excruciating “sims” to qualify to open the box (not clear why she couldn’t just try it to see), and the results are not what Jeanine was expecting.

Some of the plot developments, from a book written by an author in her early 20’s, simply cannot hold up to being portrayed onscreen. At times it’s just a weaponized vision of the highly cliquish tables at the high school cafeteria. Even pros like Winslet and Naomi Watts (as a rebel leader) cannot quite put their thinly conceived characters over. But Woodley never lets us forget that the biggest struggle Tris has is not with the repressive regime but with her own fears and regrets. Her sincerity and resolve outshine all the fight scenes and give some depth to the superficiality of the storyline.

Parents should know that this film includes constant peril and intense violence with guns, knives, suicide, and threatened suicide, many characters injured and killed, some disturbing images, a sexual situation, a storyline about repressive government and personal and political betrayal, and several swear words.

Family discussion: Why does Jeanine think she is acting on behalf of the greater good? Why does Caleb? How does our society try to categorize people?

If you like this, try: the “Hunger Games” films and “The Giver” and the books they are based on