A man is released from prison after serving 15 years for planning to keep $15 million in diamonds that he was stealing on behalf of his employer, a Ukrainian mob boss named Rabbit. His former lover and accomplice, Rabbit’s daughter Anastasia, took off with the diamonds. Rabbit is after him because he thinks the man will lead him to his daughter and the diamonds. The man flees to the small fictional, Pennsylvanian town of Banshee, where Anastasia has been living under the alias of Carrie Hopewell, the wife of the DA with two children. Lucas Hood, the new sheriff, arrives in town and is immediately killed when he intervenes in a dispute between local criminals and a bar owner. The man takes Hood’s identity and has to impersonate the sheriff and deal with ex-Amish crime lord Kai Proctor, sort things out with “Carrie” and get his share of the diamonds while evading Rabbit.
Season 1 focuses on Hood’s attempts to restore his relationship with Carrie under the looming threat of Rabbit finding them. Hood completely disregards the law while clashing with Proctor and pursuing his often criminal activities, alienating his deputies. Rabbit eventually tracks him down and Hood surrenders to spare Carrie. Carrie leads some criminal accomplices and the deputies in a raid to free Hood and shoots Rabbit.
Season 2 deals with tribal chief Alex Longshadow’s attempt to build a casino on the reservation which places Sheriff Hood in the middle of a violent struggle between Longshadow and Proctor. Carrie must face up to her past when she is imprisoned for her part in the raid against her father. With Carrie trying to fix her marriage, Hood enters into a relationship with his deputy Siobhan. He must deal with the real Hood’s son when he comes to Banshee looking for his father. Hood and Carrie are forced to track down and confront Rabbit and settle things once and for all when they learn he survived being shot.