Once upon a time book one: ever, ever after

What is the line bbetween good and evil?

Princess Odette is known as the fairest and kindest of her land but turns into a swan by night as punishment for her affairs. Meanwhile, Odile lives as a traitor, a bad guy, but lives in fear of what she can do.

When the Enchanted Forest gets cursed to Storybrooke, Odette and Odile must do what it takes to survive with no memories of their past and what happens when a woman enters town by the name of Emma Swan?