Don and his team search for the fundamentalist leader of a polygamous sect who is on the FBI's most wanted list for committing numerous crimes, including rape and murder.

When a teenage girl is found almost beaten to death, Don and his team discover that she escaped from a polygamous cult headed by a fundamentalist leader who is on the run from the FBI. They discover that the girl's mother, who is also a religious zealot, "gave" her daughter to the leader. Meanwhile, Charlie and Amita try to decipher a chart that was found at the leader's last known location, hoping it will lead them to him.

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