Complex sentence: They find themselves in their hometown of Leadworth, chased by the Eknodine, an alien race that have disguised themselves as the elderly of the town and who are able to turn anyone else into dust by blowing a poisonous liquid on them.
Split into simpler sentences: They find themselves in their hometown of Leadworth being chased by the Eknodine, an alien race that have disguised themselves as the elderly of the town. The Eknodine are able to turn anyone into dust by blowing a poisonous liquid on them.