This takes place in mystic falls, a city home to Witches, Vampires, and Hybrids. The travelers invade mystic falls and do a spell to destroy Spirit Magic, meaning that Magic done by Witches will perish, meaning that Vampires, Hybrids, Witches will lose their powers. But the Vampires and Witches have a plan to get everyone back to the world of the living. Once every one has returned, they will try to take back their town.
The Travelers were an ancient community of gifted Witches who used powerful magic to achieve great things, including things that were frowned upon by other Witches. Qetsiyah and Silas were two members of the Travelers, and considered to be their most powerful members. However, things changed for the Travelers when the two created a spell for Immortality. When it was used on Silas and Amara, it caused a severe schism in the entire Witch community. The community was divided between those witches who sought to preserve what they saw as the natural balance of the world by using their powers for that aim, and those who believed they could use it to do anything. Fearing the power that could be unleashed on the world, a group of powerful Witches called upon The Spirits, placeing a curse on Qetsiyah's entire coven. The curse prevented them from gathering as a tribe, an act which would cause disasters such as plagues, fires and earthquakes whenever they gathered. Also, they no longer had access to traditional magic sources.
However, the Travelers eventually discovered that the curse only prevented them from gathering inside their own bodies, and that only magic coming from the earth was forbidden to them. They discovered a different way to practice magic and used it to create the Passengers, as a means to gather undetected by the other Witches and for them to avoid the curse by using other people's bodies. The Travelers also remained together and avoided the curse by never stopping anywhere more than one night. This also allowed them to prevent the witches from finding them. Witch Covens, such as that of Liv and Luke Parker, tried to track the Travelers for several millenia, but they were never able to find them. This led to centuries of war between the Travelers and the Witches. The Travelers also began to believe that the now-dominant form of magic, Spirit Magic, was a perversion of the magic they considered to be 'pure', and they became determined to have their revenge on the witches by destroying that perversion.