Writing my first book im not sure if this is a clear or long enough Synopsis if you could give advice Thanks!?

Sam is a typical, everyday 18 year old guy with wild parties, girls and college on his mind. Until just before graduation everything he has ever known is changed forever. With these new changes exploding through his body, He is given two new basic instincts… to survive and to drink blood. With the authorities close behind, all that Sam holds dear to him will be put to the ultimate test. How far can Sam stretch the bonds between human and Vampire?