Series 2 begins when Jim Hogan (Adrian Dunbar, Line of Duty) returns home a year later, stripped of his medical license and determined to make amends and reconnect with his family. He finds that his eldest daughter Fiona Crowley (Grainne Keenan, Victoria) is ailing, slowly succumbing to the same debilitating illness that afflicted her mother, and her husband Paul Crowley (Ian Lloyd Anderson, Love/Hate) is struggling. Jim's determined efforts to make amends and reconnect with his family only seem to add to their grief, and things worsen when he stumbles upon suspicious activity at the farm where Paul works. When Fiona's car veers off the road and crashes into a canal, her family gather round to support her. But they are shocked at their core when Detective Dez Breen (Sean Duggan, The Lobster) arrives with news of a disturbing discovery.