Brielle and Alexa were best friends. After crossing over from modern times, they became a pair of spies sent from a rival kingdom to secure peace through marriage, only to find themselves wed to Prince Edward, a cold and battle-hardened warrior, and his cunning, libertine brother, Prince William. Though both brothers approached the marriage with deep suspicion, even attempting murder on multiple occasions, they never expected that Edward's supposedly elite spy was actually a pure, bookish nerd obsessed solely with knowledge, utterly clueless about romance and schemes. Meanwhile, the naive, lovestruck girl William thought he could manipulate turned out to be a master player, thoroughly versed in human nature, who swiftly turned the tables on him. And so began a sweet, mistaken-identity revenge story.
