Dex Parios is a sharp-witted army veteran with a complicated love life, gambling debt and a brother to take care of. Her skills make her a great PI, but her style puts her in the firing line.

Dex is hired by a wealthy man to search for a woman whom he recently met, but she quickly learns that the task is not as simple as it seems. Meanwhile, Dex and Grey's history unfolds.

In hopes of becoming a certified private investigator, Dex seeks mentorship from veteran PI Artie Banks. Hoffman grows suspicious of Grey after evidence proves that he has a connection to a victim in his case.

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

Despite being ordered by Lieut. Cosgrove to take time off, Hoffman enlists Dex's help to investigate a case. Tookie's culinary skills come in handy at Bad Alibi and Dex stresses over an interview to become a certified private investigator.

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