Dr. Mick Strong has bought himself something unusual for his seventy-fifth birthday: a LifeTime projection. This new tech crunches data including your medical history, diet, and lifestyle to predict how much—or little—time you’ve got left.

That’s all well and good, but he’s also bought them for his daughter, his grandchildren, and even his eleven-year-old great-grandson. He wants them each to wait until their next birthday to use the app. But whether they scoff at it, sneak an early look, desperately turn into a health nut, or die before their appointed time, the gift is wreaking havoc on the whole family.

This dark, insightful novel about hope, fear, and stubborn curiosity reminds us that we never quite know what lies ahead—and that when it comes to love and family, there’s no time like the present.