Imagine a clock which shows hours and minutes. Doesn't sound weird, does it? But it's different from other clocks: it doesn't just show the time, it shows how many hours you have left. Sophie has lived a good life since she was born. She grew up in a wealthy family and her clock always showed many years to live happily. Until one day, the many years become less and less.

Tessa Young is an 18 year old college student with a simple life, excellent grades, and a sweet boyfriend. She always has things planned out ahead of time, until she meets a rude boy named Hardin, with too many tattoos and piercings who shatters her plans.