The Vampire Diaries.

Based on Season Two of TVD ...

Ellie and Elena's doppelgänger, Katherine Pierce, arrives in Mystic Falls, and her reasons for returning to Mystic Falls, she is looking for something, and she came back for Stefan.

Mason Lockwood arrives after the death of Tyler's father, hiding a family secret. Tells Tyler about the "Lockwood curse."

Caroline is no longer human. She died with Damon's blood in her system. Katherine's main reason for returning is to find the moonstone.

After some complications, if Katherine gets hurt, it also affects Ellie. Katherine finally admitted why she didn't kill Ellie or Elena that they were in danger. Ellie is later kidnapped by a masked individual and held hostage by vampires. Rose admitted that she or her sister needed to be sacrificed to break the sun and moon curse. Stefan rescued Ellie.

Klaus, one of the Original vampires, arrived and is now hunting Elena and Ellie, but Ellie makes a deal with Klaus's brother, Elijah, to protect her loved ones.

Uncle John returns to Mystic Falls, and this comes as an unpleasant surprise to Elena, Ellie, Damon, Jenna, and Alaric. John reveals to Damon that the only way to kill an Original is with a dagger dipped in white ash.

Ellie finds out that if a vampire uses the dagger, that vampire will die. Ellie stabbed herself in the stomach, and Elijah begged her to help him heal her. To prevent Ellie from dying.

Damon feeds her his blood to prevent her dying in the sacrifice, much to Stefan's displeasure.

Stefan tries to work a deal with Klaus to save Ellie's life. Klaus agreed to the deal to have Stefan work for him. John asked Bonnie to cast a spell on him. The next morning, John succumbs and dies. At his funeral, Jeremy gave Ellie a letter from John, telling her that he would always love her and that she would always be his daughter, even if she became a vampire.

Will Ellie survive? Will Elena survive?

Will Ellie be able to keep her relationship with Stefan? Or will Katherine break them apart..