6/8. When Cassie immerses herself in a undercover assignment, threats both known and unexpected haunt her every living breath. Rob desperately hunts down one last lead. [S,AD]
4/8. As Cassie struggles to make sense of Lexie's life and death, we delve into her own difficult past. Meanwhile, Rob's past finally yields some results in the Katy investigation. [S,AD]
3/8. All of Knocknaree mourns as Katy Devlin is laid to rest, while the pressure on Rob and Cassie mounts as there are still no arrests in the case. [S,AD]
2/8. Despite Rob's promise to Cassie that they won't investigate Operation Vestal, they make a dark bargain to keep the secret and carry on working on the cases. [S,AD]
1/8. In the summer of 2006 detectives Rob Reilly and Cassie Maddox are sent to investigate a child's murder. They find a community caught between the old Ireland and the new. [S,AD]