Clarke Griffin is a time traveler, but not by choice. When she was 15 a bright pink portal opened and she fell into it, and fell into a different time. And ever since, she travels whenever the portal appears. To the Past and future. This is her life. In her 8 years of traveling, she has found out how to make the next portal the final one, but still working on it. Her next destination is what seems like a post apocalyptic future where once huge buildings stood have fallen are now covered by mother nature. Clarke must survive until the next portal appears in this world alone, or so she thought. A group of survivors that call themselves grounders capture Clarke. And the adventure begins.