Dex faces off against Artie Banks to take down wealthy real estate mogul Randall Tapper. Meanwhile, Detective Cosgrove leads an investigation to find Wallace Kane, a prisoner on the loose.

When Dex's ex Fiona, a famous musician, comes into town for a performance, Dex must protect her from a stalker. Meanwhile, Grey continues to receive the cold shoulder from Dex, and Tookie and Lieutenant Cosgrove develop a new friendship.