Mary Louise Burrows, a fifteen-year-old girl with an unusual level of maturity, is thrown into a world of espionage and intrigue when her beloved grandfather is accused of treason. Determined to clear his name, Mary Louise embarks on a thrilling adventure, using her sharp wit and unwavering determination to unravel a complex web of deception. Along the way, she forms unlikely friendships with other girls at her boarding school and teams up with a skilled federal agent and his daughter, who themselves are caught in a dangerous game of secrets and lies. As Mary Louise digs deeper, she uncovers family secrets and shocking truths, facing personal challenges and moral dilemmas as she strives for justice and the protection of her loved ones.