The Immortal Countdown

Imagine a world where you could tell the exact time and date of your friends death, but not your own? That's the world that average teenage Trissa lives in. She lives every day of her life knowing when her loved ones are going to die... but she can't tell them. They can't tell her when she's going to die either. But in a turn of events. Trissa refuses to accept her fate, and ends up discovering the secret to immortality. But can she find the cure soon enough? Or will her everlasting immortal countdown reach zero?