Her parents want a betrothal, but Mairead MacKenzie can't get married without revealing her secret and no man will wed her once he knows. Plain in comparison to her siblings and extremely reserved, Mairead has been called "MacKenzie's Mouse" since she was a child. No one knows the reason for her timidity and she would just as soon keep it that way. When her parents arrange a betrothal to Laird Tadhg Matheson she is horrified. She only sees one way to prevent an old secret from becoming a new scandal. Tadhg Matheson admires and respects the MacKenzies. While an alliance with them through marriage to Mairead would be in his clan's best interest, he knows Laird MacKenzie seeks a closer alliance with another clan. When Tadhg learns of her terrible shyness and her youngest brother's fears about her, Tadhg offers for her anyway. Secrets always have a way of revealing themselves. With Tadhg's unconditional love, can Mairead find the strength and courage she needs to handle the consequences when they do?