After being betrayed and killed by the person she trusted most, the continent’s deadliest assassin is reborn as a nanny for a neglected imperial prince. Though shocked by her new life, she slowly grows attached to the lonely child and decides to use her skills to turn him from the empire’s most ignored prince into the next crown prince. At the same time, she secretly plans to take revenge on the man who destroyed her life.

But as she works to protect the prince and navigate the dangerous palace, mysterious men connected to her past begin appearing around her, each carrying their own obsession, regrets, and hidden feelings. Caught between revenge, politics, and unexpected romance, she must decide whether to keep living for vengeance or open her heart to a new future.