In the not-too-distant future, the aging gene has been switched off. To avoid overpopulation, time has become the currency and the way people pay for luxuries and necessities. The rich can live forever, while the rest try to negotiate for their immortality. A poor young man who comes into a fortune of time is too late to help his mother from dying. He ends up on the run from a corrupt police force known as the "time keepers".

The story of two teenage girls who discover they were accidentally switched as newborns in the hospital. Bay Kennish grew up in a wealthy family with two parents and a brother, while Daphne Vasquez, who lost her hearing at an early age due to a case of meningitis, grew up with a single mother in a working-class neighborhood. Things come to a dramatic head when both families meet and struggle to learn how to live together for the sake of the girls.