Frank causes tensions in the stevedores union when he plans to run again for treasurer, despite an earlier agreement to let Ott take the position next.
The ensuing argument escalates to the point where Ziggy impulsively takes a gun and shoots Glekas and a shop attendant.
When Aimee questions Nick about the sums of cash she has found hidden in his room, he tells her he is being paid off the books by the person who runs the warehouse he claims to work for.
Nick drowns his sorrows while drinking in a local park, where he is joined by his and Ziggy's childhood friend Prissy.
After the FBI agents offer to help trace the contraband containers' origins, Valchek arrives at the detail and lays into Daniels for failing to deliver a case on Frank.
McNulty is disappointed when Fitz tells him that tracing text messages is impossible without knowing the service provider and the call's time and location.
Fitz and Bunk trace a call using FBI technology and subpoena the billing information from the service provider.
Bunk talks the phone company clerk into allowing them a peek at the records, and is dismayed to see messages are written in Greek.
While the song technically has a source within the universe of the story, with Detective Pryzbylewski playing it from a CD and ending the montage by pressing pause, this scene still noticeably stands out among the rest of the show which usually makes a point of not including non-diegetic music (with few exceptions).