A physicist awakens from a 30-year coma, only to find herself at the age of 65, the result of a deliberate accident caused by her closest friend and invention partner. Determined to reclaim the lost decades, she decides to travel back in time using a device they invented together, seeking revenge and to prevent the tragedy. Yet, even as she attempts to change her fate for the better, the repercussions of altering the past bring new challenges and tough choices — and the accident seems destined to happen no matter what.