"Eleven-year-old Kemi Carter loves scientific facts, specifically probability. It's how she understands the world and her place in it. Kemi knows her odds of being born were 1 in 5.5 trillion, and that the odds of her having the best family ever were even lower. Yet somehow, Kemi lucked out. But everything Kemi thought she knew changes when she sees an asteroid hover in the sky, casting a purple haze over her world. AMPLUS-68 has an 84.7% chance...

Just as Eden's relationships with her best friend and family are falling apart, she discovers a means of communicating with Will, whom she had a crush on until his death two weeks before their graduation.