After a sudden family tragedy, Cassie Blake moves in with her grandmother in Chance Harbor, Washington, the town where her mother lived years before. Cassie quickly starts to learn from her new classmates that there things about her past that she never knew about--like the fact that she and her new friends are all witches, and they want Cassie to join them in creating a new generation of the Secret Circle. As Cassie starts to unlock her new powers, she uncovers a dark side to her abilities and soon comes to realize that with her new found destiny comes a level of danger.