Justice runs in the family... Danny consults a psychic to solve the murder of a young boy; Frank is at odds with the mayor over how best to protect the city from an uptick in crime following a high-profile shooting; Erin investigates a decades-old case. Tension escalates between Frank and Mayor Chase after Frank makes a public arrest that goes viral. Also, Danny and Baez investigate a gang attack that takes an unexpected turn; Jamie worries when Eddie lies to him about where she's going in the evenings; and Anthony secretly recruits the Reagans for help with a surprise for Erin.