As the hit Irish legal drama returns, solicitor Tara Rafferty (Amy Huberman, The Clinic) is embattled but not beaten. She has built a new life for herself after leaving her cheating fiancé, Eric (Rory Keenan, War & Peace), and the high-powered law firm where they both worked. But with one of her employees betraying her and another in jail, she struggles to keep her fledgling practice afloat. Convinced that her former boss-Eric's scheming father-is behind it all, Tara decides to strike back. To pay the bills, Tara takes on clients whose legal problems range from deportation, to divorce from a bigamist, to a lawsuit against a convent. As she frequently faces off against Eric and her former colleagues in court, Tara's mentor, Vincent (Neil Morrissey, Line of Duty), leads a high-level corruption inquiry that could endanger them both.
Following Meg's betrayal, Tara's team has been evicted from the cafe and Ray is in jail. Tara is convinced that Eric's father is behind it all. While working to free Ray, Tara also picks up an immigration case defending a woman scheduled to be deported in a few days' time.
Tara is approached by a father who claims his child's mother should not have custody because she lives in a commune. Vincent lashes out at Tara about the corruption inquiry, and Ray starts his own investigation.
Tara helps an ex-nun suing her order for breach of contract, but the case pits Tara against Eric and the woman he cheated with. Vincent's new witness gives evidence that helps his inquiry, causing anxiety at Dunbar & Calloway.
Tara becomes closer with Eric's brother, Sam, while her office mate, George, defends a family known to be involved in crime, but the case is complicated when Tara accidentally finds damning evidence.
After their fight, Tara and Eric are on opposing sides for difficult repeat clients, when the woman Eric previously represented now wants a divorce from her bigamist husband.
Eric becomes suspicious about the sudden changes at Dunbar & Calloway, including Sam's new job. As Tara and Sam's relationship grows more serious, Tara finally learns the truth about her father.