Plus-sized and practical Jillian Marks is the responsible one in her family. She got all the common sense and her little sister Sabrina got all the skinny genes. When Sabrina plans a custom kinky kidnapping as a Christmas present for herself, Jillian tries to talk her out of it but her ditzy sister won't listen. Muscular and intense Kyle Stephens is a Dom who is looking for a permanent sub—a curvy woman who can submit in the bedroom but still think for herself. He takes Sabrina's file but mistakenly 'naps the wrong sister, grabbing Jillian instead of Sabrina. Now Jillian is bound and gagged in a dungeon, learning to submit to the man of her dreams who has her kidnapped for Christmas.