Noa, born as a second boy to the lord of the manor, was hated by his brother and was locked up in his room for many years. He felt like he wasn't living his life. Then one day, he meets a beautiful girl, Sophia, who is meant for him...but he never expected she was the most skilled assassin in his country. She fell in love with him at first sight, and promises that she will save him from his brother. A love story with lots of battles and conspiracy!