When Agent Carter is suspended for hitting another police officer, King and Maxwell go onto the case to see if he was set-up by someone inside the government. But who would have the means to frame Carter and what could be the motive?

King and Maxwell are called in by FBI Agent Rigby to help with case involving the kidnapping of a 13-year-old boy by a Colombian terrorist group.

Someone is targeting the members of Sean's old Secret Service detail that was involved in an incident in Mexico ten years ago.

A Congressman planning to run for the Senate, is worried someone might uncover dirt that would embarrass his family. Sean identifies the likely muckraker, but when she is murdered, they then have to find out who is behind her murder.

Michelle's brother JT Maxwell suddenly appears looking for help on a background check of a woman's fiancé. Michelle is reluctant to get involved with her brother's case, but once they do, they find he may be a con man without a past.

While they are visiting Rigby at the FBI headquarters, everyone is locked in when someone manages to infiltrate the building and kill a witness for a congressional investigation. Rigby has to swallow his pride and ask them for their help.

Michelle considers rejoining the Secret Service while Sean uncovers a vital clue to finally solve the Ritter assassination.