Before

In the summer of 1973, 19-year-old Cassie returns to her home town on the Massachusetts coast after her first year away at college. The next day, her boyfriend Julian is implicated in a brutal killing. Seven years later, a freak occurrence gives Cassie the ability to cast her consciousness back in time to a younger version of herself, allowing her to re-live that earlier time with the benefit of foreknowledge.

Imagine if at the age of six, you had ditched your four-year-old sister in the front yard to go play with your friend in the house… and then you never saw her again. In the intervening years, now living in Silicon Valley, Rebecca has made a mess of her life. She hates her job, has no career prospects, and has never had a successful relationship. But soon she realizes this strange ability she recently gained, allowing her to cast her consciousness back into a younger version of herself, can be used to discover who took Sadie that fateful day.