When a witness comes forward to testify against the worst-of-the-worst criminals, the U.S. Marshals are called in to protect them before and after they testify - helping them transition into the anonymous safety of the Witness Protection Program. Meet Mary Shannon, one such U.S. Marshal, a beautiful and strong-willed woman who balances her duties baby sitting targets with her responsibilities to her dysfunctional family, which includes her delinquent sister and her eccentric mother.
