Abigail, the only daughter of a baronial family, is 24 years old. Since an incident when she was 15, she gave up on love and marriage, living quietly at home. One day, to protect her childhood friend Ted, she suffers a serious injury to her forehead. The one who inflicted the injury is Gilbert Egan, the count known as the 'Apostle of Slaughter'. Unintentionally hurting Abigail, Gilbert, who was looking for a fake marriage partner, proposes a marriage of convenience. Abigail, believing this marriage will help her protect her childhood friend from the Count's wrath, accepts. Thus, a marriage without love is formed. Abigail, who had no hope in life, finds courage and purpose through marriage. Gilbert, touched by Abigail's kindness, finds his cold heart slowly thawing. Enjoy the bitter and sweet married life of Abigail, who gave up on love and marriage due to a secret, and Gilbert, the Apostle of Slaughter, who believes he has nothing to lose and doesn't trust anyone.