Once bitten

"Buffy Summers--the Slayer, the Chosen One meant to save the world from the literal evil forces of hell--must save her friend Xander before he dies... and returns as a vampire. As Giles and Willow each take drastic measures to find a cure, Buffy must face the hardest choice of her already not-so-easy life: save her friend or stop her new enemies, Drusilla (AKA The Mistress) and Spike from opening the Hellmouth. But where does the mysterious vampire with a soul named Angel fit into this mess? And what secret is he hiding that will forever change the war between the Slayer and the Mistress?"--Provided by publisher.