It's a vampire novel. I forgot the name of the novel and the protagonist. I'll talk about the beginning first. I probably feel that my foster father was killed by someone.

The protagonist was a young man named Arwen. He was a member of a vampire family, but his family had always been facing a crisis because their ancestors left behind a secret that made their family intolerable to humans. Arvin's father was a famous vampire hunter. In order to protect Arvin and his family, he risked his life to capture vampires who wanted to attack humans. However, during a mission, Arwen's foster father was killed by a human, which made Arwen very sad and angry. Alvin decided to inherit his father's career and become an excellent vampire hunter. He left his family and began an adventure. On this journey, he met all kinds of people, including some friendly vampires and some unfriendly humans. He also discovered that he had some special abilities that could have a profound impact on his mission. In the end, Arvin successfully uncovered a bigger conspiracy and protected the peace between humans and vampires. He returned to his family, reunited with his father and the others, and began to rebuild their family.