The death of a woman in the home of a well-known architect (guest star Elias Koteas) opens Grace's eyes to a new world. Meanwhile, Ham is thrilled to be partnered up with Grace again and hopes it will also mean rekindling their romantic involvement. Also, Bobby's undercover assignment comes to an explosive end. Clay has a new friend who is also helping out at the police station (Lost's Malcolm David Kelley). And Leon Cooley struggles to find his lost faith.