The Chapin Sisters on Bones This Week

Their song plays as Angela examines bones and artifacts from a slave ship dating back centuries. "Sweet Light" is the opening track on their just released sophomore album, "Two."

The show "Bones" revolves around Dr. Temperance Brennan who is a brilliant, but lonely, anthropologist whom is approached by an ambitious FBI agent, named Seely Booth, to help the bureau solve a series of unsolved crimes by identifying the long-dead bodies of missing persons by their bone structure.