The Hunger Games: Mockingjay - Part 1

After Katniss Everdeen destroys the arena's forcefield at the end of the Quarter Quell, she is evacuated along with Beetee and Finnick to the underground sanctuary of District 13, a hidden stronghold that secretly survived the Capitol's supposed destruction of it decades ago. The rebellion's leader, President Alma Coin, along with former Head Gamemaker Plutarch Heavensbee, asks Katniss to serve as the 'Mockingjay'—the living symbol of the uprising meant to inspire the districts to openly revolt against the Capitol. Katniss is initially reluctant, traumatized and grief-stricken, but agrees after watching televised Capitol broadcasts in which Peeta Mellark, who was captured during the arena escape, appears increasingly manipulated and hollowed out by the Capitol's handlers. Her conditions for agreeing include immunity for Peeta and the other captured victors, and the right to kill President Snow herself. Coin accepts the terms.

Katniss embarks on a series of propaganda shoots—called 'propos'—with a film crew led by Cressida, traveling to destroyed and war-torn districts to record footage that can be broadcast to inspire rebellion. In District 8 she visits a makeshift hospital housing wounded rebels; the Capitol's forces bomb it shortly after her visit in retaliation for her appearance there. Enraged, Katniss delivers an impassioned, unscripted speech directly into the camera, which Plutarch uses as potent propaganda. In District 12, now reduced to ash and bones, she sings 'The Hanging Tree,' a haunting folk song tied to her family's history; the footage is broadcast simultaneously with rebel forces attacking a hydroelectric dam in District 5, cutting power to the Capitol.

The Capitol counters by staging a series of television appearances by Peeta alongside Caesar Flickerman. Peeta warns District 13 of an imminent Capitol assault, giving the district time to evacuate into its deepest underground bunkers before the bombs fall. After the all-clear, Katniss returns to her quarters to find them strewn with white roses—Snow's deliberate message that he can reach her and will continue to torment Peeta whenever she acts against him.

President Coin authorizes a covert rescue mission to extract Peeta and the other captured victors from the Capitol. As the mission unfolds, Beetee hijacks the Capitol's broadcast frequencies, and Finnick—on camera—reveals that Snow has long forced 'desirable' tributes and victors into sexual slavery for wealthy Capitol citizens, and that Snow systematically poisoned political rivals to consolidate power, drinking the same poison himself as a cover, which left him with mouth sores he conceals with roses.

The rescue team successfully retrieves Peeta along with victors Johanna Mason and Annie Cresta. But when Peeta is reunited with Katniss, he lunges at her and nearly strangles her to death before being forcibly subdued. It emerges that the Capitol subjected Peeta to 'hijacking'—a tracker jacker venom–based psychological conditioning that replaced his memories of Katniss with fear and hatred, effectively programming him to kill her. The Capitol had deliberately allowed his capture during the rescue, turning him into a weapon. Peeta is placed in isolation while medical specialists work to develop a treatment to reverse or undo the conditioning. The film closes with Coin announcing the rebellion's next strategic objective: taking District 2, the Capitol's last remaining stronghold loyal to Snow, as the war moves toward full-scale confrontation.

Sources: Wikipedia