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

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