As the youngest member of her High House, Catarina von Hasenberg is used to being underestimated, but her youth and flighty, bubbly personality mask a clever mind and stubborn determination. Her enemies, blind to her true strength, do not suspect that Cat is a spy - which makes her the perfect candidate to go undercover at a rival House's summer retreat to gather intelligence on their recent treachery. Cat's overprotective older sister reluctantly agrees, but on one condition: Cat cannot go alone. Alexander Sterling, a quiet, gorgeous bodyguard, will accompany her, posing as her lover. After Cat tries, and fails, to ditch Alex, she grudgingly agrees, confident in her ability to manage him. After all, she's never found a person she can't manipulate.