This is an interesting YA novel as it is set in the 1400s so it is somewhat historical but at the same time fantasy. There is royal intrigue, plots, strange customs and dangerous women.Ismae has been marked since birth. She is a daughter of death better known as Saint Mortain. Daughters of death it seems are beautiful and have some other worldly qualities to them. Ismae’s special talent is with poison she is immune to it in all forms. She is saved from an arranged marriage and sent to a convent for daughters of Mortain. There she is educated and trained to be a deadly assassin for Mortain’s bidding. After years in the convent the time had finally come be sent on her first assignment. She killed a man that might have repented his past transgressions and was trying to clear his name for Brittany (the country not the girl). To figure out who is plotting against Brittany she must set off to court with Gavriel Duval where she can use her gifts to assess who is plotting against Brittany and the Duchess Anne.I liked that there were complex characters in this novel. No one was all good or all bad. Even our heroine is sorely misunderstood. She can tell when someone is about to die or sense them after they have died. Even she doesn’t understand the scope of her gifts. But she is feared as death is feared. Gavriel too is complex dutiful to the core but sometimes he goes against the norm for what he thinks is right even if it brands him a traitor to his sworn saint. The romance that eventually grows between them is sweet and takes its time to blossom. He sees Ismae for who and what she truly is and never tries to change her. I felt so bad for Anne, she has to marry to make an alliance to keep her kingdom that is on the brink of war but some of her suitors are treacherous and if wed she will surely die soon after so they can control her kingdom. The story was so interesting and watching Ismae grow into a bold woman was fascinating. I loved how she came to better understand Mortain and the two sides of him better throughout the book to realize possibly that being an assassin was not all he wanted for his daughters. There were some great nail biting moments and honestly after the first 100 pages I just couldn’t put it down. Incredibly unique heroine.