The tragic death of a young mother and her infant child leads Cathal to a sad story of parental neglect and institutional cover-up.

A rival news station breaks a child pornography story, and Cathal is forced to risk his own daughter to save his crumbling reputation.

Cathal's vendetta against the police comes to a head following an armed siege in which a man shoots at officers and is later found dead in his cell.

Five teenagers are killed in a late night car crash, and the painful truth sets Cathal on a collision course with the grieving families.