: Following her resignation and a three-week downward spiral involving heavy partying with her mother, Bunny, Erin Lindsay is called back into action by Alvin Olinsky to help save Halstead.
: Olinsky confides in Sergeant Trudy Platt that he has a newly discovered daughter, Michelle, who is in juvenile detention. Subplots : [S3E1] Life Is Fluid
The episode follows the Intelligence Unit as they track down Derek Keyes (played by guest star Bokeem Woodbine ), Chicago's most-wanted heroin kingpin. The mission becomes critical when Detective Jay Halstead is abducted and tortured during an undercover operation gone wrong. : Following her resignation and a three-week downward