Angela Henson (Abigail Spencer) is a straight As student with a loving family, and dreams of becoming a doctor. Then at age fourteen, Angela finds out that her parents are revealed to be CIA agents, suspected of treason for selling state secrets to the enemy. With her parents in prison, Angela's path takes her on a journey as an FBI agent in New York City, with a specialty for finding out when both suspects and victims are lying. However, the past still has a hold on Angela, making her suspicious of others, and closed-off to her new boyfriend Peter and younger brother, Jerry. No matter how much she tries to right the wrongs of her parents, she must still face them, and figure out whether or not they may possibly be sending her coded messages. Angela拥有上天赋予的能够立刻辨别他人是否撒谎的能力。Angela由于父母不得不对她撒谎而使得她的这一天赋日臻完美。当她14岁时，她发现其实她的父母是间谍，他们的任务是执行对于叛国罪行的裁决。Angela能否解救她的家庭，能否帮助她麻烦缠身的弟弟，又能不能让她自己的生活和事业依旧井然有序……