Cassie McClay thought she was just a normal girl. A teenager with loyal friends, a quiet life, and simple dreams. But everything changes in a single night. A sudden attack, an unknown power awakening inside her, and a shocking truth: Cassie belongs to a family of Vampire Slayers. As she faces a dark world she had never known, she's forced to fight not only bloodthirsty creatures, but also the secrets that have always been kept from her. And when Derek, an enigmatic and dangerously charming vampire, enters her life, the line between good and evil begins to blur. Torn between duty and feelings she can't control, Cassie must decide whom to trust and what she's willing to sacrifice to protect the ones she loves. Because the real battle isn't against vampires-it's against the destiny that wants to decide who she must become.