The fourth and last installment in "The Hunger Games" franchise aims to remind fans of why heroine Katniss Everdeen (Jennifer Lawrence) volunteered in the first place - to save her sister Prim. The heart-wrenching newly released trailer for "The Hunger Games: Mockingjay Part 2" focuses on the center of the series' plot, the sisterly bond between Prim and Katniss, Entertainment Weekly reported.

The trailer opens with loving scenes featuring the sisters from the previous films, like the moment that Katniss comforted her younger sibling after she woke up from a nightmare. Another scene shows Katniss giving Prim her Mockingjay pin for protection. And there's also a flashback to the scene that started it all, when Katniss volunteered as tribute to enter the Hunger Games on behalf of her little sister.

In "Mocking Jay Part 2," Katniss must face the evil President Snow and lead the revolution against the Capitol and its oppression, according to Time. The trailer shows an exchange between Katniss and Snow.

"I never asked for this," Katniss tells Snow. "I just wanted to save my sister and keep Peeta alive."

"It's the things we love most that destroy us," Snow tells her.

Tickets for "Mockingjay - Part 2" go on sale Oct. 1 at noon EDT, and the film will hit theaters on Nov. 20, according to Entertainment Weekly.

Watch the emotional trailer below.