Forgotten Secrets by Elizabeth Rose

Known as a gossip and for never being able to keep a secret, Morag Douglas longs to change her reputation. She strives to do great things like her sister and cousins, and desires to be a true member of the Followers of the Secret Heart. Then an opportunity arises for her to be mentored in this secret group of strong women. But when she meets up with the mysterious knight, Sir Bedivere, her plans go astray.
Sir Bedivere Hamilton arrives at Rothbury Castle harboring a dark secret. He is an assassin with one more job to do before his debt will be paid. But when his last mission directly involves Morag, a woman who has taken his interest, he must make a choice that could change both their lives forever.
Can a woman who has everything to prove help save a man from making the biggest mistake of his life? And will a man with a debt to pay commit treason to protect the woman he loves?