Angela is a bridesmaid at the wedding of her closest friend from college, but has to keep leaving to investigate death threats to a well-known news anchor. Meanwhile, Angela asks Dozer to track down her ne'er-do-well younger brother.

Angela's team is stymied in their investigation of a wealthy socialite suspected of murdering an intruder, when he takes refuge in a church. Meanwhile, Angela's brother talks her into paying a visit to the mother she hasn't seen in years, who is dying.

Investigating the disappearance of an opera singer, Angela finds a link between the missing star and a married politician. Meanwhile, Dozer enlists her brother in preparing a surprise birthday party.

When a deadly virus is stolen from a laboratory, the team has less than 24 hours to stop a terrorist from letting it loose on the general public. Meanwhile, Angela's brother Jerry shows up with new evidence that their parents were imprisoned unjustly.

Angela arranges for her brother Jerry to meet her boyfriend Dylan, but things are interrupted by a shooting involving an unexpected visitor from her past. Leo and Dozer hunt for the gunman with their only clue being the code word "bluebird," a reference to her first case with the FBI. Meanwhile, flashbacks reveal how Angela was recruited to join the bureau.

While tracking down stolen photographic artwork, the team encounters a dangerous assassin thought to be long dead. Meanhile, Angela has another quarrel with her brother Jerry that almost brings their relationship to the breaking point.