After receiving a mysterious package from her long-lost father, LA lawyer Fiona Sharpe travels to Ireland to uncover the truth behind his cryptic letter; as she delves deeper into his past, Fiona finds herself caught in a web of secrets.

Young cop Roisin secretly helps Fiona in uncovering clues that suggest foul play; as Fiona digs deeper, she discovers a web of criminal activity involving horse thefts and cons run by the shady Patsy Burgess.

Fiona, Musa and Róisín investigate the next clue in the briefcase, a pair of blood-stained mixed martial arts gloves with a hidden metal gauze; Róisín suspects a link to a local criminal fighter.

Fiona's mother, Mary, arrives to take her back to the U.S., but a visit to a grave and an unexpected encounter with an old flame force them to face old wounds and unexpected truths.

After Fiona and Róisín uncover Declan's hard drive, Fiona questions his death; Johnny McIntyre is mysteriously broken out of prison.

Fiona races to expose the truth behind the sabotage of a car rally and its tragic consequences, only to discover her family's involvement in a criminal empire and the ultimate betrayal.