"The Twilight Saga: Breaking Dawn - Part 1" involves Edward and Bella preparing for their wedding and the birth of their child. The sequel, "The Twilight Saga: Breaking Dawn - Part 2," involves an all-out war between different vampire factions over Edward and Bella's baby.
In "The Twilight Saga: Breaking Dawn - Part 1," Edward, played by Robert Pattinson, and Bella, played by Kristen Stewart, marry, causing controversy with their friend, Jacob, played by Taylor Lautner. Bella reveals to Jacob her intention to have sex with Edward, who could easily kill her, as he is a vampire, and she is still a human. Edward and Bella end up consummating their marriage, resulting in Bella becoming pregnant. Bella's health suffers as a result of the vampire baby growing inside her, and the film ends with Bella becoming a vampire herself.
The sequel, "The Twilight Saga: Breaking Dawn - Part 2," sees different factions of vampires fighting over Bella and Edward's baby, Renesmee. According to vampire tradition, a half human, half vampire baby endangers the vampire race. Over the course of the film, the different vampire factions prepare for a massive battle, which occurs at the end of the film. However, the battle turns out to be a hallucination created by a psychic vampire to demonstrate the horror an actual battle might bring. The factions make peace, and Edward and Bella live happily ever after.