A Polar Bear King comes to claim eighteen-year-old Cassie for his bride and she must decide whether to go with him and save her long-lost mother, or continue helping her father with his research.

When Cassie was a little girl, her grandmother told her a fairy tale about her mother, who made a deal with the Polar Bear King and was swept away to the ends of the earth. Now that Cassie is older, she knows the story was a nice way of saying her mother had died. Cassie lives with her father at an ...