The FBI assigns Danny to find a young woman in rural Utah who is missing and feared dead. She was part of a polygamist community, where men take multiple wives and everyone avoids contact with the outside world. To infiltrate the clan, the Arnos pose as a polygamist family, but Celeste is none to happy to be Danny's second wife. Eli, the oldest son in the clan (photo attached) falls in love with Ruby, who tries to ditch him one night and stumbles, literally, over a dead body by the side of the river. It isn't the girl the Arnos are looking for, but she appears to have been severely beaten. Barbara then discovers a diary that talks about a shed where disobedient girls are taken to be punished. Can the Arnos discover what's going on before there are any more deaths -- and before Ruby is forced into an arranged marriage with Eli?

After his team stops at a diner where he meets Celeste, Cuban soccer player Lazaro decides to defect to the U.S. The FBI asks Danny to keep Lazaro at the Arno house for a few days to find out if he's really a defector or, perhaps, a terrorist. A suspicious Danny puts a tracking device in Lazaro's sneakers, and then follows Celeste and Lazaro when she offers to take him to the mall. On the way there, Lazaro asks Celeste to stop at a hotel where his teammates are staying. As a surprised Celeste watches, Lazaro tries to convince his frightened girlfriend Marisol to defect also, and they agree to meet secretly at the sports arena the next day. Meanwhile, Danny has learned from the FBI that Lazaro is probably carrying a bomb. Are the FBI's suspicions correct? And if so, is Marisol also involved-and can Celeste stay out of a potentially explosive situation?