The Intelligence Unit discover a drug smuggling operation when a balloon filled with cocaine bursts inside a student drug mule; tensions rise between Olinsky and Ruzek.
An expensive necklace goes missing at the scene of a fire, leading to an internal investigation; Cruz makes a desperate decision to save his brother from a gang war.
With Lincoln's execution just minutes away, the team make a break for it.
Intelligence investigate a murder case which leads to internal conflict when they discover that the main suspect, a baseball player, has a connection to Olinsky.