Fifteen-year-old Kat is more her father's housekeeper than his daughter. Just like all Upslope women, Kat is required to stay close to the hearth and as far away from Downshore and its savage people as possible. Kat must remain respectable - and that means covering her wild red hair, finding a husband to care for, and never singing, swimming, or dancing.
But Kat knows there must be more to life - she can feel it in her heart. She can hear the call - the sound of drums beating, drawing her to the forbidden beach. When Kat can no longer resist the call, she discovers what she thinks is a fatally injured seal washed up on the shore. Instead, she has found a Rig, one of a charmed race of mythical seal people. The only way to save this mysterious man is to defy her father and her community and seek aid in Downshore. But does Kat have the strength to stand on her own?