A body buried for 6 - 20 years is uncovered at a construction site. Munch and Lewis begin the process of trying to solve this old crime. Falsone and Ballard's relationship has heated up, and that fact becomes apparent to their fellow detectives. Sheppard returns to work, but is discouraged when Gee assigns her to desk duty. Gharty tells Billie Lou that he'll attend her bass-playing concert. Munch & Lewis with help from the ME and MGee, identify the body and then begin to piece together what happened to her. Gee lays down the law to Ballard & Falsone: they have to knock it off if they want to stay working on the same shift; they agree.