In her previous life, she killed her family due to a conspiracy. With regret, she chose to end herself. However, when he woke up, he turned into a baby. In this life, family love and friendship softened the hard-as-a-stone heart she had trained as a killer in her previous life... She thought she could live a normal life, but things in the world were unpredictable, and the conspiracies made her tired and tired, but she had to go deep into them. She faced it with strength, just for the sake of the people she wanted to protect...