Inspired by true events, follows Shelly Mohan, a housewife, mother of three, married to a Garda detective, who kills her former partner in crime when he threatens to expose her dark past. With her unsuspecting husband hunting for the killer, Shelly must cope with pressures of the tightening noose as well as continue caring for an ailing son, her unfaithful husband, and all usual burdens of motherhood.