Da Vinci leads the search for the body of a boy who fell into a river. Is there something more to the death than just a tragic accident? Kosmo investigates a man whose wife has disappeared. A doctor is shot on his way to a clinic. Shannon and Leary chase down his killer.

While Da Vinci remains at odds with the Mayor and Police Chief he attracts attention from Ottawa. Meanwhile, Leary and Kosmo discover that a murdered drug runner was under police surveillance and Shannon's reaction to a personal loss puts his job in jeopardy.