After Reggie Wilson, a witness in a former case of Erin’s, asks her for help shutting down a drug operation in his apartment building, she makes it her mission to make the building safe for his family. Also, while investigating a teen’s suicide, Danny and Baez uncover information that suggests the death was a homicide, and Frank looks into potential misconduct within the Mayor’s office.

Murdoc moves forward with his plans for revenge against MacGyver by recruiting his recently released former cellmate to infiltrate the Phoenix Complex as a "lab technician" and kill every agent inside.

Mary and Darnley wed in a lavish affair, which proves to be a successful decision in regards to her political standing. James makes an interesting discovery about Greer, while Elizabeth frantically tries to salvage England’s power.