After someone breaks into Luis Delgado's home and kills his wife, Luis and Danny team up to take down the vicious murderer who may also be responsible for Linda's death. Also, Frank finally meets Eddie's mother, Lena, and Jamie and Erin are at odds after Jamie seeks her help charging a man who confessed to him while under the influence.

DNA evidence in a murder case leads Danny and Baez to identical twins with identical alibis. Also, Frank learns Nicky is interviewing for a job at the Justice Coalition, which he rarely sees eye-to-eye with, and Jamie visits Eddie's father, Armin, in prison.