**Powerful emotional thriller with realistic, nuanced, flawed characters**

Although set within a science fiction premise of time travel, the show masterfully presents an emotional thriller that is grounded in the human experience.

The first season follows the tumultuous relationship of Philip and Evelyn. Philip is well-meaning but slightly controlling lawyer, while Evelyn is an independent and emotional cellist. Their relationship is a constant push and pull between love and control and independence, and when Evelyn decides she's had enough, Philip stumbles on the "Plan B" agency, an agency that will allow him to travel back in time to change the past.

With this power, his controlling and obsessive tendencies come to a new head. Given the power to control everything, he becomes more and more obsessed with changing the past to keep Evelyn with him.