The Deadline - 1D fanfic - includes slash.

Meet Bethan Parker, a sixteen year old girl who has another thing coming when she meets Niall Horan and the rest of his vampire family. Trouble developes as love burns. Louis and Harry must race against time to rescue one another, Perrie and Zayn are halfway across the globe, Cher and Liam must keep their siblings in line - while their father Simon (the one with all the answers) has gone missing! Can they find Simon in time, and stop the person who apparently has a dark past with Bethan?