She is the most unreliable and unlucky female assassin. She lost her sword before the assassination began and was knocked unconscious by a carriage. When she woke up, she found herself deep in the imperial city. The queen who looked exactly like her asked her to pretend to be herself. How did it all happen so suddenly? The prince has an affair with the queen, but there is another mystery behind it; the prince is proficient in Miao poison; the emperor is rumored not to be promoted; the mysterious cloaked man appears many times; the Ye human race is surprised to appear in the palace... Everything has settled, and the same cruel ending is revealed.