When a man is found wandering the street with blood all over his clothes, Danny and Baez try to find out what happened but the man says he doesn't remember. He says he's from out of town and he's with his girlfriend and that he's planning to propose to her. They go back to his hotel room and find his girlfriend dead and blood all over the room. While the guy still maintains not to know anything, Danny has no choice but to take him in. Danny's not sure what to believe. An off duty cop who was drinking comes across a robbery and stops it. Later, Jamie shows up and smells that he's been drinking and tries to help him but the Captain sees what he's doing and orders that the cop be tested. When he comes out positive, he has to face a hearing. Frank, who admires what he did, but believes in following the rules. And Erin gets a call from her daughter's school who informs her that her daughter is planning some kind of protest and if she goes through with it, she'll face suspension.