A diverse group of recruits has arrived at the FBI Quantico Base for training. They are the best, the brightest and the most vetted, so it seems impossible that one of them is suspected of masterminding the biggest attack on New York City since 9/11.

At Quantico, the recruits are tasked with performing a hostage rescue training exercise that shakes Alex, making her question her ability and whether she should quit Quantico. While in the future, Alex continues to search for clues, finding one that questions the innocence of one of her closest classmates. But is her clue really what she thinks? No one is who they seem.