U.S. Marshal Mary Shannon secretly relocates federal witnesses while attempting to manage her dysfunctional family.

Mary looks after a 10-year-old boy, serving as a witness and tries to stop the state from returning him to his drug-trafficking father.

Mary must act as a maid of honour to protect her witness, a diamond smuggler, at her high-profile wedding.

Mary and Marshall get caught in the crossfire of a contract killer while transporting a particularly irritating witness.

When Mary's key witness, an art dealer, is targeted, his mistress and wife are key suspects and get placed in witness protection.

Mary learns that her first witness, now a college basketball star, has a gambling problem that could destroy the new life he and his brother have spent five years building.